expanding disks

I have an expanding disk. Is it possible to revert it to a plane disk. Or do i have to wait untill next update when compressor problem is solved?

Running parallels 3.0

Greetings

 

From the PD 3 User's Guide:

Virtual Hard Disks
The capacity of a virtual disk can be set from 20 MB up to 128 GB.
Virtual hard disks can be in one of two formats: plain or expanding.
plain
The file that stores an image of disk in this format has constant size from the moment it is created. This reserves space on virtual disk even when there is no free space on the real hard disk. It also allows the guest OS to operate a little bit faster. Disk in plain format can be created with the help of OS Installation Assistant, in the Custom mode.
expanding
The file that stores an image of expanding disk is small initially and grows as you add applications and data to the virtual disk. The size specified when the disk is created is the disk capacity, while the disk image file has a smaller size most of the time. Using disks in this format saves space on the hard disk of your Macintosh computer.
Disks of both formats require certain maintenance, for more information see Maintaining Virtual Hard Disks (page 230).
Note. You cannot change the format of the virtual disk in the current version of Parallels Desktop.

Phil