Any known problem running on MS Virtual PC 2007 SP1?

Apologies if a question about Seagate's DiscWizard (11.0.0.8326, still current as of late last year though since superseded) here is inappropriate: I've posted this question on Seagate's forum but their knowledge of this software is uneven and Acronis has filled that gap for me in the past.

I just tried running DW on MS VPC 2007 SP1 and encountered the message "This is not the last created volume of the image backup" when attempting to restore (or otherwise access - e.g., validate or mount) an image (whether one I had copied into a VHD or accessing one via a shared disk on the host). It turned out that this message was displayed only when the size of a backup image exceeded around 4 GB (not with 3.6 GB, did with 4.7 GB), so I'm guessing that for some reason it got confused either by any file larger than FAT32 could support (though the images were on NTFS) or by anything larger than would fit on a single conventional DVD (after a quick Google around I did try renaming such files to make sure it wasn't a trailing number in the name that confused it, but to no avail).

I can try recreating this image in smaller pieces to see if that helps, but thought I'd ask here as well (if only to let others know that there might be a problem).

I'm aware of an interaction between True Image and network shared disks in which the system's IRP stack size needs to be increased, but the image size dependency seems to suggest that this is not a different manifestation of that problem.

I also tried the DW bootable CD (same DW version) in the VM but it just hung while trying to boot up, which may well have been a different problem (VPC 2007 doesn't pretend to be able to boot everything, but AFAIK it does try to run everything installed in a supported virtual OS).

Thanks for any insight you can provide.