GIMP: Error In Installer?

heyas,
I've just tried installing portable Gimp (two times, both didnt work) on my flash drive. It's a 512mb Kingston Datatraveler if thats any help.
I can download the *.exe file from sourceforge, no troubles. I goto install it, by double clicking on the *.exe file, the installer gets to 23% and then hangs, all it does is the creation of the directories -- nothing else.

Is anyone else having this problem? or does someone know what could be going wrong?

Cheers Miksago aka micheil.