I created a new.exe based on the code from the msblast.exe worm.

My code downloads and runs the patch from microsoft and seals the hole/exploit.
It deletes the blast virus and its 3 known variants.

I set it loose on my network here at 9:00 last night and all the machines were patched within 20 minutes. (250 off)

It did slow the network to a grinding halt but the log file it was reporting back to did show its path and I'm satisfied that I maintained a level of control over its path and it didn't make it into the wild. (Nearly crapped myself when I thought it had.)

Its a great way to seal the exploit on your network.

I am throwing together a scanner type tool to search for the exploit and a single non replicating tool to send and patch p.cs.

If anyone wants to lend me a hand I would be greatfull.