GPE is GPE (gpe.handhelds.org)
Opie is Opie (opie.handhelds.org)
e is Enlightenment (no idea where off the top of my head)
modules-2.6.16-akita.tgz contains kernel modules, as there's no feed for this atm iirc.
The gpe file was the first one I tried. It didn't work.
Did you check the md5sums for all the files to make sure nothing was corrupted?
Si