Fingers crossed for you KG
. I would echo BOFH's suggestion and slipstream SP2 into a fresh CDROM when you can. I have not used the 'Freeware' autostreamer, but followed (successfully!) the instructions on a web site I can send to you if you wish.
The task I set out on of slipstreaming all the updates proved TOO long-winded
so I understand I will have to wait for a MS 'update roll-up for SP2' when the task will be easier.
You will, therefore, have to patiently download/install/reboot/download/install yawn yawn yawn all the updates when you are up and running with SP2 again.
I have also downloaded all the updates to hard drive, incidentally 'just-in-case'.