Error Code 0x660 - .NET Framework Install Failed

I have been through all of the posts, and have yet to find an answer to this
problem.

I'm running XP Pro, with Service Pack 2. I have tried unsuccessfully to
install the .NET Framework 2.0 update 6 times; each time I get a failure
notice (KB829019), and Error Code 0x660. I am able to download the update,
but the install won't work.

I DO NOT have the 2.0 Beta version that everyone keeps talking about in the
posts; I am running 1.1, with the hotfix update. I've checked
C:\WINDOWS\Microsoft.NET\Framework , and there are no other updates in there.

I completely turned off all firewall and anti-spyware programs, but again to
no avail.

Any thoughts? I actually have a program that REQUIRES 2.0 to run, so I do
need to install this.

Thanks!
David