Thanks again for sharing, that's pretty cool

From the screenshot, I remember the Jackal and Rich (rfblasco). Rich did poke his head in here at some time, but I don't think he was around much. I met them at the TrespasserNet forum, must have been around 2000. You might want to try the
Internet Archive if you haven't already, but I've had little being able to revisit forums through there.
Well, then I reckon there's a good bit you don't know about yet

I'm sure I'm forgetting a lot, but I'll start.
Andres James made a program called TresView, which allowed people to view Trespasser levels. This later evolved into
TresEd, the Trespasser Level Editor still used to this day. You can also visit the
Homepage of Andres James for history and more information on the editor. I see some THS tools on his site as well, though I don't know if he was ever a member of THS or THS II.
The source code of the game has been uncovered, though I'm not sure if it's up for download here somewhere. Some specific things I remember people restoring were hitspangs, treesap particles (priorities, right?), dinosaur emotions, and jumping raptors.
I'm not sure if I remember this correctly, but I think user Lee Arbuco used the source code to create the
Trespasser CE patch. The link will lead to the forum post, if you're interested in its origin.
To grab it (and have the easiest time ever getting the game to run), I suggest you download the
Trespasser 2020: A Trespasser Modding Starter Kit by MikeTheRaptor. It has a very helpful and easy to use guide. So easy, even I could do it.
For more history, lots of different builds of the game have been unconvered. You can grab them all
here. The Plantation House was its own level before it was cut and the house was moved to the Jungle Road level. The Pine Valley level was cut and later stripped and used as the demo. Both cut levels are in these builds, as well as the E3 demo.
Check out the
patches to get builds 22-32-55 going, there should be some retail compatability patches available.
Aside from builds, various
developer design documents have been uncovered as well, such as the scripts for Hammond and Anne.
As for
levels/mods, too many to list

From the top of my head I check out these:
-
TresCom Ops Anthology (Act I-IV)-
Trespasser Isla Sorna-
JPDS Jurassic Park Dark Secrets-
East DockWelcome home
