@Amsal really thanks, i will update decomp tomorrow so no worries
generally in decomp nothing changes, masks only exist to instruct how a compressor behaves
example: all text files are compressed next to each other and movies the same and so on
thus gaining an upper hand in everything, trying to apply the best settings in each case
so it doesnt affect decompression because decomp doesnt care what it extracts as long as it extracts
DETAILS TOMORROW
its 4 morning here :P