LinuxQuestions.org - LMV on 200 student computers that has run out of room in VMWare?

My first submission.
Here goes. I run computer laboratories in a community college in California, that is, I am responsible for part of the lab configuration. We run Fedora 10 as a guest O.S. in a VMWare Workstation environment on top of a Vista host for about 200 student stations. (Most of our courses are Windows based, thus dictating the Host/Guest alignment we use.) I'm a self-taught LINUX enthusiast in love with Fedora 10, but few faculty, staff or students seem to share my ardor for Fedora or LINUX.) The complete package is rolled out each semester via Sematic Ghost, which is not part of my bailiwick. The initial setup had an harddrive with 8 Gb of reserved space. The "Disk Usage Analyzer" reports that I have a 4.1 Gb HD rather than the 8 GB I'd reserved. Rather than fight with VMWare, I decided to add a second 8 GB HD, but I'm stuck with an LVM and I do not know how to add the second HD. Students have their work stored on the initial drive, so I cannot simply blow each of the 200 implementations away and start over.
Next semester I'll probably configure my setup using traditional partitions, but how can I incorporate the additional space now to limp by with what I now have?