picture question .. how to remove colores

hi i have trouble with removing colors from pics , i tryed my luck with paint.net but they delete too much from the text in the pic .. basicly i need help to remove the green screen so i can use the text for a shirt print .. or if you want to remove it for me i have the 5 pics ready on mega .. need help plz



here the mega links :
https://mega.nz/#!chNlWKzR!pTNqX-NnJ...tAz7dFuD5C0su4
https://mega.nz/#!FptymKjQ!dHzImnwum...ILh9g1h0C7L_vs
https://mega.nz/#!h50wGQZB!_wtE01pRF...MZ4MfDik_E5VkM
https://mega.nz/#!IxUnVBwA!BCWjiG64O...-RJkVxj_FMMyWM
https://mega.nz/#!Ms0VjAZZ!maBq0HTM2...ANNBmvR3lFmhpo

Get your hands on photoshop or GIMP and this this is easy work. If you can get ahold of the text file and install it on your computer you won't even have to use those images either. Websites like dafont.com may have something similar. The more complex graphic design programs should net you an alpha layer making the background invisible when you add your text.

yea looks like i have to do it my self like allways .. was just wondering if some one could help because in the skate picture thread sounds everyone like a master in making pic´s or working with it ..