Going through work slowly. Taking out launcher check so you can run pop3.exe directly - easier for debugging. Noticed something new - Starforce 3.6 is writing in time values when game is unpacked (similar technique to Pac World 2). Although I took out most triggers so they become harmless.
PntScn button does nothing on all versions for me - XP + (US SF / US nocd / EU - RLD / EU - GOG / EU-nodrm).
Level crashes I'm learning how the mathematics work in detail.