I too got about 6 "Device Restart" errors.
What I did was turned off the PC and 990. Then turned on the 990 and then turned on the PC.
After XP loaded up, I was able to install the S/W with no "Device Restart" messages.

I think that between Step 8 and Step 9, they should say to turn the 990 and computer off and then turn back on.
http://www.outlawaudio.com/support/990.html