diff --git a/src/main/iidxhook6/Module.mk b/src/main/iidxhook6/Module.mk
index 8ef02e7..7fda87b 100644
--- a/src/main/iidxhook6/Module.mk
+++ b/src/main/iidxhook6/Module.mk
@@ -7,6 +7,7 @@ deplibs_iidxhook6   := \
     avs \
 
 libs_iidxhook6      := \
+    iidxhook-d3d9 \
     iidxhook-util \
     ezusb-emu \
     ezusb-iidx-16seg-emu \
diff --git a/src/main/iidxhook6/dllmain.c b/src/main/iidxhook6/dllmain.c
index 4b689ae..b4ca65a 100644
--- a/src/main/iidxhook6/dllmain.c
+++ b/src/main/iidxhook6/dllmain.c
@@ -25,6 +25,8 @@
 #include "hooklib/rs232.h"
 #include "hooklib/setupapi.h"
 
+#include "iidxhook-d3d9/bb-scale-hd.h"
+
 #include "iidxhook-util/acio.h"
 #include "iidxhook-util/config-gfx.h"
 #include "iidxhook-util/config-io.h"
@@ -44,6 +46,7 @@
     "Usage: launcher.exe -K iidxhook6.dll <bm2dx.dll> [options...]"
 
 static const hook_d3d9_irp_handler_t iidxhook_d3d9_handlers[] = {
+    iidxhook_d3d9_bb_scale_hd_d3d9_irp_handler,
     iidxhook_util_d3d9_irp_handler,
 };
 
@@ -63,14 +66,20 @@ iidxhook6_setup_d3d9_hooks(const struct iidxhook_config_gfx *config_gfx)
     d3d9_config.framerate_limit = config_gfx->frame_rate_limit;
     d3d9_config.pci_vid = config_gfx->pci_id_vid;
     d3d9_config.pci_pid = config_gfx->pci_id_pid;
-    d3d9_config.scale_back_buffer_width = config_gfx->scale_back_buffer_width;
-    d3d9_config.scale_back_buffer_height = config_gfx->scale_back_buffer_height;
-    d3d9_config.scale_back_buffer_filter = config_gfx->scale_back_buffer_filter;
     d3d9_config.forced_refresh_rate = config_gfx->forced_refresh_rate;
     d3d9_config.device_adapter = config_gfx->device_adapter;
 
     iidxhook_util_d3d9_configure(&d3d9_config);
 
+    // The "old"/current scaling feature does not work with 20-26 because
+    // the render engine changed and provides its own built-in scaling feature
+    if (config_gfx->scale_back_buffer_width > 0 &&
+        config_gfx->scale_back_buffer_height > 0) {
+        iidxhook_d3d9_bb_scale_hd_init(
+            config_gfx->scale_back_buffer_width,
+            config_gfx->scale_back_buffer_height);
+    }
+
     hook_d3d9_init(iidxhook_d3d9_handlers, lengthof(iidxhook_d3d9_handlers));
 }
 
diff --git a/src/main/iidxhook7/Module.mk b/src/main/iidxhook7/Module.mk
index db61d88..a40366a 100644
--- a/src/main/iidxhook7/Module.mk
+++ b/src/main/iidxhook7/Module.mk
@@ -2,11 +2,13 @@ avsdlls         += iidxhook7
 
 ldflags_iidxhook7   := \
     -liphlpapi \
+    -ld3d9 \
 
 deplibs_iidxhook7   := \
     avs \
 
 libs_iidxhook7      := \
+    iidxhook-d3d9 \
     iidxhook-util \
     cconfig \
     ezusb-emu \
diff --git a/src/main/iidxhook7/dllmain.c b/src/main/iidxhook7/dllmain.c
index 5faf1b2..af948f6 100644
--- a/src/main/iidxhook7/dllmain.c
+++ b/src/main/iidxhook7/dllmain.c
@@ -25,6 +25,8 @@
 #include "hooklib/rs232.h"
 #include "hooklib/setupapi.h"
 
+#include "iidxhook-d3d9/bb-scale-hd.h"
+
 #include "iidxhook-util/acio.h"
 #include "iidxhook-util/config-gfx.h"
 #include "iidxhook-util/config-io.h"
@@ -44,6 +46,7 @@
     "Usage: launcher.exe -K iidxhook7.dll <bm2dx.dll> [options...]"
 
 static const hook_d3d9_irp_handler_t iidxhook_d3d9_handlers[] = {
+    iidxhook_d3d9_bb_scale_hd_d3d9_irp_handler,
     iidxhook_util_d3d9_irp_handler,
 };
 
@@ -63,14 +66,20 @@ iidxhook7_setup_d3d9_hooks(const struct iidxhook_config_gfx *config_gfx)
     d3d9_config.framerate_limit = config_gfx->frame_rate_limit;
     d3d9_config.pci_vid = config_gfx->pci_id_vid;
     d3d9_config.pci_pid = config_gfx->pci_id_pid;
-    d3d9_config.scale_back_buffer_width = config_gfx->scale_back_buffer_width;
-    d3d9_config.scale_back_buffer_height = config_gfx->scale_back_buffer_height;
-    d3d9_config.scale_back_buffer_filter = config_gfx->scale_back_buffer_filter;
     d3d9_config.forced_refresh_rate = config_gfx->forced_refresh_rate;
     d3d9_config.device_adapter = config_gfx->device_adapter;
 
     iidxhook_util_d3d9_configure(&d3d9_config);
 
+    // The "old"/current scaling feature does not work with 20-26 because
+    // the render engine changed and provides its own built-in scaling feature
+    if (config_gfx->scale_back_buffer_width > 0 &&
+        config_gfx->scale_back_buffer_height > 0) {
+        iidxhook_d3d9_bb_scale_hd_init(
+            config_gfx->scale_back_buffer_width,
+            config_gfx->scale_back_buffer_height);
+    }
+
     hook_d3d9_init(iidxhook_d3d9_handlers, lengthof(iidxhook_d3d9_handlers));
 }
 
diff --git a/src/main/iidxhook8/Module.mk b/src/main/iidxhook8/Module.mk
index f51688c..e71c8c2 100644
--- a/src/main/iidxhook8/Module.mk
+++ b/src/main/iidxhook8/Module.mk
@@ -12,6 +12,7 @@ deplibs_iidxhook8   := \
     avs \
 
 libs_iidxhook8      := \
+    iidxhook-d3d9 \
     iidxhook-util \
     acioemu \
     bio2emu \
diff --git a/src/main/iidxhook8/dllmain.c b/src/main/iidxhook8/dllmain.c
index 95e968b..13509be 100644
--- a/src/main/iidxhook8/dllmain.c
+++ b/src/main/iidxhook8/dllmain.c
@@ -18,6 +18,8 @@
 #include "hooklib/rs232.h"
 #include "hooklib/setupapi.h"
 
+#include "iidxhook-d3d9/bb-scale-hd.h"
+
 #include "iidxhook-util/acio.h"
 #include "iidxhook-util/config-gfx.h"
 #include "iidxhook-util/d3d9.h"
@@ -43,6 +45,7 @@
     "Usage: launcher.exe -K iidxhook8.dll <bm2dx.dll> [options...]"
 
 static const hook_d3d9_irp_handler_t iidxhook_d3d9_handlers[] = {
+    iidxhook_d3d9_bb_scale_hd_d3d9_irp_handler,
     iidxhook_util_d3d9_irp_handler,
 };
 
@@ -60,14 +63,20 @@ iidxhook8_setup_d3d9_hooks(const struct iidxhook_config_gfx *config_gfx)
     d3d9_config.framerate_limit = config_gfx->frame_rate_limit;
     d3d9_config.pci_vid = config_gfx->pci_id_vid;
     d3d9_config.pci_pid = config_gfx->pci_id_pid;
-    d3d9_config.scale_back_buffer_width = config_gfx->scale_back_buffer_width;
-    d3d9_config.scale_back_buffer_height = config_gfx->scale_back_buffer_height;
-    d3d9_config.scale_back_buffer_filter = config_gfx->scale_back_buffer_filter;
     d3d9_config.forced_refresh_rate = config_gfx->forced_refresh_rate;
     d3d9_config.device_adapter = config_gfx->device_adapter;
 
     iidxhook_util_d3d9_configure(&d3d9_config);
 
+    // The "old"/current scaling feature does not work with 20-26 because
+    // the render engine changed and provides its own built-in scaling feature
+    if (config_gfx->scale_back_buffer_width > 0 &&
+        config_gfx->scale_back_buffer_height > 0) {
+        iidxhook_d3d9_bb_scale_hd_init(
+            config_gfx->scale_back_buffer_width,
+            config_gfx->scale_back_buffer_height);
+    }
+
     hook_d3d9_init(iidxhook_d3d9_handlers, lengthof(iidxhook_d3d9_handlers));
 }