Is there such thing as an unlimited point matte in Premiere? Basically my problem is I have footage which I need to manually key.  I need something like an unlimited point matte which would allow me to cut an actor out of a background by hand with no limits on the number of points in the matte.  Ideally this would be done in Premiere, but I have access to After Effects as well, I just don't like using it.  Also, if this is possible to do frame by frame as an image sequence in something like GIMP I can do that to.  I'm not sure if it's possible to import an alpha channel into Premiere though.
I think you need to use the Rotobrush rotoscope tool in AE.. Good luck!  It will take a while...

Tutorial link:
https://library.creativecow.net/harrington_richard/after-effects-cs5-roto/1