When MS releases a new service pack, or new Windows update, we install these to the master image and create a new version of the Sysprep image for future VMs.
Update SQL Server service packs
Update Windows Server 2003 service packs
Update Windows
Update VS.NET service packs
Update SharePoint service packs
Update MS Office SharePoint Designer service packs
To create a new VM:
Make a copy of the master.vhd, rename it to the next version
Create a VM using this new vhd
Copy additional setup files to D:\install\
Modify the scripts in D:\scripts\
When finished, power down the VM. Make a copy of this and rename it to sysprep-vNext.vhd
Create a new VM using this new vhd
Start it up, and then run the sysprep command in D:\sysprep\
This will generalize the computer's settings and shut it down
Don't start up the VM again - or it'll run the start up scripts
Zz old copies of the master.vhd and sysprep.vhd