It's actually rather easy to do it within the rules. We had it setup in 2008 but never ended up using it. And now it's even easier because you can connect over Ethernet to the cRIO.
The main issues are:
- You need a DC to DC power suply that runs off 12 volts. The one we used was about $50.
- You cannot use a hard drive. Back in 2008 SSDs were still too expensive, so I simply hooked up a 8GB SD card and ran Linux.
- You have to modify the CPU heat sink to fit the KOP fans on, or use a _huge_ (and heavy) passive heat sink.
- Somehow find a solution to the BIOS battery. In 2008 the inspector knew about it and said it was ok, but I'm not sure it should have been.