A question about Big Buck Hunter, and upgrades

[Dannymh]

Im looking into setting up a BuckHunter machine, and have found a full kit for Shooters Challenge. I would like to know if down the track upgrading is possible, or whether an entire new motherboard is required.

I was reading some information from various sites and I can not get it clear in my head. One site mentioned that you can swap out the hard drives but you also need to get the boot rom and chip for that version as well.

I wanted to find out if this is actually possible, because otherwise I am considering instead using the PC version with TopGun instead.

Cheers
Dan