Thank you Fabian - I've been looking for this for so many years!
I got it running at 224P on a CRT using
CRT EmudriverI made a batch file to start it:
Load a resident
AutoHotKey Script to make it exit on ESC (ESC key triggers ALT-F4 key sequence)
Executes an
NirCmd task to press CTRL-F and make it full-screen (slightly-delayed)
Start Rokko-Chan at a resolution of 256x224 using
Display Changer IIKill the resident ALT-F4 on ESC press AutoHotKey script from memory
Change the resolution back to what it was before.
I've included the necessary files for using it at double resolution (512x448) which should work with unmodified drivers on most PC monitors. Someone using these files will have to create that (custom) resolution in their video card's driver, change to that resolution, then make the xml configuration file for Display changer II by using this command in a command prompt
dc2.exe -create="512.xml"
I won't be able to provide support here, but hopefully these will be useful to someone.
http://anapan.525lines.moe/Rokko-Full.zip