I have installed the pack, and the other thing to configure it, and I have internet calling on the home screen showing that it is available, but I have no idea on how to make a call thru the sip instead of gsm.

any idea how to do that without installing a 3rd party sip client?

Also, does skype work ok on a jasjam with WM6? it tells me I am missing files when I try to run it. Never tried on WM5...