The new INSTALL.DAT? it's uncompressed, if you mean the old laggy one instead I tried compression only once with v1.36.00 and wasn't helpful, though I forgot the parameters, it was probably the default compression. If it can save 20% then I'll try compressing with v2.49.32. ________________________________ IT WORKS! lol how did they manage to improve compression from 1% to 20%? I just assumed it was the same as before. Line 424 in UMD Patcher (v0.2b).bat: Code: cpkmakec.exe "temp\install-en" INSTALL.cpk -align=2048 -mode=FILENAME -code=UTF-8 -forcecompress -view >> debug.log 2>&1 _________________________ NOTE: CPK archives compressed with -forcecompress using v2.49.32 cannot be extracted with the current version of quickbms.exe and cpk.bms (for now) so if you're a translator working on this, make sure to keep backups. EDIT: important note.