Yolotweak the grub.cfg to try to fix scenario on some machine booting on Grub (I guess?) instead of isolinux (? i have no idea what i'm talking about), but preseed file wasnt loaded on grub

files_to_inject/boot/grub/grub.cfg

@@ -0,0 +1,92 @@
+if loadfont $prefix/font.pf2 ; then
+  set gfxmode=800x600
+  set gfxpayload=keep
+  insmod efi_gop
+  insmod efi_uga
+  insmod video_bochs
+  insmod video_cirrus
+  insmod gfxterm
+  insmod png
+  terminal_output gfxterm
+fi
+
+if background_image /isolinux/splash.png; then
+  set color_normal=light-gray/black
+  set color_highlight=white/black
+elif background_image /splash.png; then
+  set color_normal=light-gray/black
+  set color_highlight=white/black
+else
+  set menu_color_normal=cyan/blue
+  set menu_color_highlight=white/blue
+fi
+
+insmod play
+play 960 440 1 0 4 440 1
+set theme=/boot/grub/theme/1
+menuentry --hotkey=g 'Graphical install' {
+    set background_color=black
+    linux    /install.amd/vmlinuz preseed/file=/cdrom/preseeds/default.preseed vga=788 --- quiet 
+    initrd   /install.amd/gtk/initrd.gz
+}
+menuentry --hotkey=i 'Install' {
+    set background_color=black
+    linux    /install.amd/vmlinuz preseed/file=/cdrom/preseeds/default.preseed vga=788 --- quiet 
+    initrd   /install.amd/initrd.gz
+}
+menuentry --hotkey=s 'Install with speech synthesis' {
+    set background_color=black
+    linux    /install.amd/vmlinuz preseed/file=/cdrom/preseeds/default.preseed vga=788 speakup.synth=soft --- quiet 
+    initrd   /install.amd/gtk/initrd.gz
+}
+submenu --hotkey=a 'Advanced options ...' {
+    set menu_color_normal=cyan/blue
+    set menu_color_highlight=white/blue
+    set theme=/boot/grub/theme/1-1
+    set gfxpayload=keep
+    menuentry '... Graphical expert install' {
+        set background_color=black
+        linux    /install.amd/vmlinuz preseed/file=/cdrom/preseeds/expert.preseed priority=low vga=788 --- 
+        initrd   /install.amd/gtk/initrd.gz
+    }
+    menuentry --hotkey=x '... Expert install' {
+        set background_color=black
+        linux    /install.amd/vmlinuz preseed/file=/cdrom/preseeds/expert.preseed priority=low vga=788 --- 
+        initrd   /install.amd/initrd.gz
+    }
+    menuentry --hotkey=w '... Expert install with speech-enabled' {
+        set background_color=black
+        linux    /install.amd/vmlinuz preseed/file=/cdrom/preseeds/expert.preseed priority=low vga=788 speakup.synth=soft --- 
+        initrd   /install.amd/gtk/initrd.gz
+    }
+}
+submenu --hotkey=d 'Accessible dark contrast installer menu ...' {
+    set menu_color_normal=white/black
+    set menu_color_highlight=yellow/black
+    set color_normal=white/black
+    set color_highlight=yellow/black
+    background_image
+    set theme=/boot/grub/theme/dark-1-2
+    set gfxpayload=keep
+    menuentry --hotkey=g '... Graphical install' {
+        set background_color=black
+        linux    /install.amd/vmlinuz preseed/file=/cdrom/preseeds/default.preseed vga=788 theme=dark --- quiet 
+        initrd   /install.amd/gtk/initrd.gz
+    }
+    menuentry --hotkey=i '... Install' {
+        set background_color=black
+        linux    /install.amd/vmlinuz preseed/file=/cdrom/preseeds/default.preseed vga=788 theme=dark --- quiet 
+        initrd   /install.amd/initrd.gz
+    }
+    menuentry '... Graphical expert install' {
+        set background_color=black
+        linux    /install.amd/vmlinuz preseed/file=/cdrom/preseeds/expert.preseed priority=low vga=788 theme=dark --- 
+        initrd   /install.amd/gtk/initrd.gz
+    }
+    menuentry --hotkey=x '... Expert install' {
+        set background_color=black
+        linux    /install.amd/vmlinuz preseed/file=/cdrom/preseeds/expert.preseed priority=low vga=788 theme=dark --- 
+        initrd   /install.amd/initrd.gz
+    }
+}
+