Wow, it's so sad to see that no one is trying to help answer your questions over the past several months
S3 issues - I hope those have been fixes - choose the ' qualcomm fix'.
32 Bits rendering - you have to restart fpse immediately after setting this for it to take effect. You may need to do it from the main screen and not from knife the game (or you nay need to do it from inside the game not from the main screen).
'still messing with opengl' look back several posts and you'll see the settings needed for opengl. Also all of the opengl settings are game specific fixes. Only a gee are compatibility settings. I don't remember what's needed without going back to look but i think you only need alpha multipass and offscreen drawing. PLEASE check my OpenGL thread, especially my opengl spreadsheet.
S3 - see above. Also I had problems with the main frame limiter which is why I used the special frame limiter.
'problem after update' and 'lost save games'
First - never rely on save states, always have your game backed up with the in game save!!
Second - You're not the only one to have problems after an update, bit your issues are the most dramatic in game examples I've ever heard of. If you were using a save state, that's the most obvious reason. You must use the exact same settings for save states to work usually - audio setting, video plugin, and video plugin settings, and even then with a new version there a risk.
Third - about lost save games. That was someone that used to be a problem so schtruck changed the way the app updates itself. It no longer messes with save files when it does updates. If you look about 10 posts back you'll find a link that explains that. http://www.fpsece.net/forum2/viewtopic.php?f=39&t=3871
Text filtering - this was something Pete spent a lot of time dealing with on the PC version on the plugin. Here were 6 filtering options to assist with it. We only have one filtering option in opengl, and I don't think it helps. The higher your screen resolution the worse the text will look.
save game files - again check past posts (or see above) for info on that. As for save game files - yes you can use memory card files. There are some restrictions... But I think you just need to rename the file extension. If it's more than that I think there is a memory file converter around. You generally CANNOT use save states unless they're fpse save states, and even then they may not work.