H-code to cheat on the Japanese proficiency test on the first startup:
/HSN-1C:-C*4@12374:アステリズム.exe
Wait for the game to ask for the code, attach the text hooker, enter H-code, click OK with the default/any code, in the text hooker select first four symbols in the text thread with the largest amount of text, copy-paste those four kanji instead of the default 四五二二. Unhook H-code after use, the game doesn't need it (nor another one).
NoDVD patch if you don't use the patch from the first post:
アステリズム.exe @ 0x18328: E8 -> B8
アステリズム.exe @ 0x148: 34 -> 04 (optional, PE checksum correction)