hi Bart
i think you may be experiencing some difficulties from using remix. I urge you to use separate mods as a general rule and also make backups and test each one as you install them before moving on to the next. I think the tutorial videos that can be found at
www.finalfantasy7pc.com are generally very helpful. Learning how to unpack and reconfigure lpg files with programs like Highwind is useful.
heres the way I build FF7pc right now
(i made .iso files from my game discs to make the actual install easier for me)
after initial install:
A.) 1.02 patch
B.) aali's custom opengl driver v.10b or maybe .9 if u cant run the latest version
C.) Phoenix Rejuvenation Project (watch the tutorial for that on the ff7pc website)
D.) Avalanche and the .08GUI
E.) ff7music
to me, at this point in time, those 5 mods are fairly comprehensive. now anything else you wanna mess with after those is up for debate and/or experimentation. I have added a lot of things to the directory mods\avalanche\ which magically appear in game (thanks to the modpath option in aali's openglcfg), like updated battle backgrounds for some areas and some of the great field scenes that have been updated by guys like SL and Yarlson.
as for stealing in ff7, its not surprising to fail 20x in a row or more. ff7 steal can be rough. seems to vary but im not super knowledgeable about it other than i think its more satisfyingly challenging than some other games in the ff series.