Your best bet is probably to use partimage.
1) Get a minimalist distro
2) Install partimage
3) Use partimage to copy the partitions on your preconfigured drive
4) Remove the preconfigured drive and replace with a blank one
5) Create the partitions
6) Run partimage to copy the partitions back
Once this is done once you only need steps 5 & 6 and these could probably be handled by a seperate script so you only have to boot and type: