One thing that would really make me go nuts is any Quake related stuff like maps, weapons, monsters, etc for Unreal Tournament.
I started porting the weapons from Q3a 2 years ago until I found a very ugly bug with the skin position in the meshes. What sucked was that I spent more than 6 months writing the script and making the animations using the MilkShape program just to see it all go to waste. I think that the biggest problem with the porting stuff from other games is that the U1 engine has more limitations than any other older engines and things never come out right for it. And aside to that, there isn't a program that can port things properly anyway.
By reading through that thread about his models made me think that whatever he was working on was looking very promising and exciting but he probably saw or got to a point that things weren't coming out right or as he expected. It is very hard for one person to work on a big conversion like that for the reason that other modders know about things that others might not know where several people can work together and share their knowledge to get the work done. Maybe the stop on his project wasn't related to copyright but the lack of help or the amount of bugs/glitches in this engine could've made him give it up. I know this for a fact because I wasn't able to port a single Q3a mesh to UT properly which wasn't possible.
