I was browsing through the forum pages on the web archive, and found the tester list here.
Sometime around the end of 2007 – beginning of 2008, a small group of regulars at the TSLRP/Team Gizka forums were asked by Dashus if we would join the final beta of the mod before release. Our job was to find bugs, report them, and post updates to the forum about our playthroughs. I forget who the original list consisted of, though most of the names would mean very little to people now. I do remember VarsityPuppet of this parish was one of us, alongside Qui-Gon Glenn, 90SK, Darth Windu, Miltiades, and… other people. They presumably had usernames and identities.
Archive.org actually has a bunch of threads saved (not a ton of stuff, but maybe someone might be interested) here.