Hmm.. well.. i had to redo it to make it look acceptable (i really couldnt live with upscaling something i spent so much time on), but these are options described in the AE help:
I tried the first option, collapse, but it didnt look that promising. And stretching the output in the render options is said to have a worse appearence, so i just changed every comp (well, it wasnt just one.. more like one in another in another). Anyway thanks for your advice..
Btw, about that line [code]trim(0,999)+trim(1000,1500).overlay(last, sign01, mask=sign01.showalpha())+trim(1501,0)[\code]
it didnt work for me.. i had to remove the 'last' in overlay because well, i think you know why :P Dont know if it gave problems to other people, at least i got an error saying something about invalid parameters.