Upgraded to OS3 with Pwnage but more problems with Cydia

Hello guys,

I have a 2G iPhone (1.5 years old) and upgraded from OS2.1 to 3 followed the iClarified guide and it works as described.
After iTunes loaded the custom ipsw the phone worked fine, same as before but at OS3.
When iTunes asked that it found a previous iPhone settings (my previous iPhone at OS2) I selected to restore. It restored all applications and everyhting worked fine but when I selected to install the cycorder application I got a warnign from Cydia that it may become unusable after removal. Since the old Cycorder application did not worked I selected to be removed and install the new one.
Now the Cydia does not work anymore and, the phone shut down and now it seems stuck at boot image, frozen.

I wish to reinstall the whole OS if possible and build a new image without so many apps and then install what it is worth it.

Is it possible to reinstall OS3 using Pwnage (MAC) from a 2G iPhone with already installed OS3? What should I do at this point when the phone is frozen at boot image please? Please help. O:)

I have entered the phone in DFU, restored with iTunes at OS3 and then using Pwnage soft (excellent work from those guys!) I have my phone back to life and everything seems to work fine except YouTube and MxTube.