.stl file and .ups file are two different things. You can´t convert one of them to be the other. The ".stl" is (as you already know) the style file with its intro, ending etc. The ".ups" is a performance file and no style at all.

Your G800 has 192 performance memory places. It works like this. Every time you will play a song, you choose a style, voices for right and left hand, perhaps chorus and reverb settings, maybe equlizer, etc, etc. All this you can save in one of your 192 performances. You can also name every performance so that you later on will have a hint of what you have saved.

This means that G800 lets you save up to 192 different performances, all with various styles (from the 128 rom or from floppy!), voices for left and right hand etc. All suitable for whatever songs you want to play.

But when you´ve filled upp your 192 performances, then what? Then you can save it (all 192 in one package) as ".ups" file. You can for instance have one ups with partysettings for younger audience with lot of synth, you can have one with your jazz favs with sax, etc and depending on occation you can load the ups you want and have immidiate link to suitable styles, sounds, effect settings, etc.

There are lots of styles (and some ready made .ups) on the net for your G800. Start with Rolands site here on Synth Zone.

Regards, Michael