2 FCP stations on one Xserve RAID

Hi all, I was intrigued by a post a bit further down, but didn't want to high jack the thread so started this one. I posted on the XSAN thread and got some good advice, but was interested in having Shane, Mark, Russell ...and anybody else chime in on my set-up.

Our facility has an X serve RAID. Up til now I had it all to myself (2 TB). What luxury! I placed the unit in an adjacent machine room since its "roar" was bothersome to say the least. Though the relative distance from the computer to the XRAID was just a couple of meters I opted to connect it to my Mac via a fibre optic cable.
We've recently added a second FCP station in yet another room, connecting it to the other side of the Xserve RAID via fiber optic cable. So now each FCP station has half of the dedicated XRAID. (1 TB each)

I understand now from the past thread that we wouldn't be able to work on the same project at the same time, but just the same it would be great to be able to access on anothers projects and media if the need arises (as it does for a monthly show we do where each editor edits a segment that are then strung together for the final program).

The other forum suggested the SANsp which I am looking into. I am not a computer geek so I'm not familiar with the GIGe Ethernet idea that Shane mentions. We don't have an IT department so we're hoping to find a solution that is easy ti implement. What do you all suggest for the most cost effective yet stable solution. Do I need to supply more info?

Dual 2.7 GHz G5, 4GB RAM, ATI Radeon 9650, Xserve RAID, AJA IO, 2 20" Cinema Display, FCP Studio 2 (6.02), OS X10.4.11