missing RPM in desktop install -- xsri-2.1.0-6

[Alan Peery]

I get 80%+ through installation of a default desktop installation, and 
the installation stops at "The package xsri-2.1.0-6 cammnot be opened.  
This is due to a missing file or perhaps a corrup package..."

At this point the install will let me retry forever, but not skip the 
package and continue on.  Is there any way to work around this?  The 
md5sums of the .iso files are correct, so I don't think I've had a 
download problem.

Detail:
I happen to be installing the software under VMWare (version 3.0, 
running on a Windows XP host).  I've swapped the .iso files by 
suspending the virtual machine and "swapping cdroms" by renaming the 
.iso files on my hard drive.  I've used this technique many times, and 
it worked for 20 minutes following the switch, so I don't think this is 
likely to be the problem.

Alan