Hi there!
I don't want to push you (I know you are busy) rather I want to open discussion about Vmware.
Would it be big deal to integrate GNS3 with Vmware virtual machines. I mean in general way. I googled quickly and found that there is some API to start Virtual machines and so on (
http://www.vmware.com/support/developer/vix-api/). I didn't investigate this more but it would be usefull.
Here are functions I have thought:
1. Configure virtual machine (or just download ready image)
2. Add it like any other device on GNS3 workspace (GNS3 could configure interface etc automatically)
3. Start it and go!
I have thought this because there are lots of network device that can be run on Vmware. Vyatta is really cool opensouce router, VPN-device and firewall. Also Stonegate firewall can be run on Vmware. I'm sure these aren't the only ones.
I would like to hear your comments about this.