>> so what's involved in using one of the XPS410 drives in the XPS 630 as a single drive without RAID
Lots of aspirin.
A quick looks shows the 410 is using an Intel P965 Express chipset, and the 630 is using a NVIDIA nForce 650i SLI chipset. So all the basic drivers wiil need to be uninstalled as set to generic MS ones, then a boot to the OS cd to do a Repair reinstall after it is in the new system.
You might be able to do it with Sysprep without too much trouble.
The above is just a short description. If you want to go ahead and do it, say so, and there are several Experts floating around that know more about it than I do (and hopefully are Subbing in to this).
But they will still say the best thing to do is:
Back up you data and settings, and go with a clean install.
