I haven’t tested it but it should work. OldUnreal’s patches are backwards compatible.

IIRC it has been 10 years since Tim Sweeney talked about open sourcing UE1. I don’t think it is gonna happen anytime soon, sadly.

At least we still have Surreal Engine.

Considering the OldUnreal team still has access to the source code for these two games, and develop patches for them to this day, I find it, thankfully, extremely unlikely!