Hi Mike,
I have had similar problems before. We tried using a wiki for a while, and had some success, but it wasn't perfect. The testers would slowly stop using anything that took more than a few seconds to edit. The wiki was quick, but not quick enough apparently. You might try asking the team what they are willing to deal with as a long term solution, and why they don't like updating what you have now. I find that people are more amenable to solutions they come up with on their own.
Justin