Full restore of Server 2008 R2 to vmware workstation 9 from windows backup image

Workstation 9.

I am trying to restore a windows server 2008 r2 backup (taken with windows built-in backup) to an existing vmware server 2008 r2 installation. Basically I'm just want to replace the install with the backup version.

The problem is, the windows backup image is on a USB drive.

The process to restore is:

1. plug usb disk into host
2. put windows server r2 DVD in drive
3. boot up guest server 2008 r2 and press escape key at bootup and then boot from CD
4. select "repair" installation
5. but here is the problem, the windows backup image is on my usb drive but at this stage I cannot see the usb drive from with the guest at the repair installation process.

Any ideas how best to do this ?

thanks