MASSIVE Virtual PC hard drive

[Dr. Trevor J. Hutley]

I am running Virtual PC 6, running Windows XP, on my G4 Al-book.

I have noticed that the (expandable) boot drive has expanded to a 
massive 5.27 Gb !!

Has anyone else noticed this ?  What can I do to get this back to a 
"reasonable" size ?   Is this another kind of creeping Windows 
phenomenon, that the Virtual PC drive eventually takes over your 
Powerbook hard drive ?!!

regards,  Trevor