Problem with build service

I installed OpenSUSE 11 a couple of days ago. For some reason installing from the build service has never worked for me, firefox always tries to download the ymp (i think that was the extension) file.

Someone suggesting associating those files with /sbin/OneClickInstall (or somehting similar, i cant recall). I tried it but i dont seem to have htta application.

How can I install it?

I should also mention I had to manually install yast-gtk since for some reason it wasnt installed by default.

I used the DVD and installed GNOME.

any help will be much appreciated.