ok, here's what I did.
I extracted the zip file and these are the files i put on the sd card
gp2xpatch-2.1.1.tar.gz
gp2xupdate.gpu
gp2xkernel.img
LPGL.txt
GPL.txt
license.txt
i held start and select, it said upgrading firmware, then patching, then complete.
Then i went to utility and ran...