Are you running an iPhone on ATT? If you are, are you using quickpwn for windows? Is it your computer or iPhone that crashes? I think you are probably using the wrong quickpwn.... which firmware do you have installed on the iPhone?
It might be because you are running vista? i'm not sure though.. I was having trouble JB'ing my phone at first but then I restored my phone to "new phone" (started from fresh) and ran quickpwn 2.2 on my xp machine and it worked perfectly.. maybe try restoring "new" if you haven't already?
Smittylube, at the point you're getting stuck, quickpwn should have already created the modified/jailbroken firmware.
I know that with PwnageTool or WinPwn (the full versions of quickpwn) the newly created firmware is saved to your hardrive somewhere.
Take a peak around and see if quickpwn has stored the modified firmware somewhere on your drive. If it has, you should be able to complete the jailbreak process using iTunes.
If you find the jailbroken firmware, do this:
Put your phone into DFU mode. When iTunes recognizes the phone in recovery mode, hold down shift and click on the restore button. A popup window will appear asking you which firmware you want to restore from. Choose the jailbroken version.