ahh, after a few days of trail and error i finally remembered the search feature for the man pages
(and
anyways, according to some docs divx from that site is not recommended, but mpeg4 is the same thing, (gentoo installed it all for me so i can use anyone)
anyways, thanks to the man pages i can shrink the bigger files down quite a bit (i got one from 228MB down to 154MB ... I'm now trying some other options to see if i can get it smaller)
anyways, i still haven't got the correct options in very well, as the window's created files are much smaller still (about 2/3 the size of mine at least) .. but i can free up enough space now to allow the files to a bit bigger
thanks linux_terror, that linked helped a lot