General discussion about Resurrection without spoilers. If you have questions about the game not concerning its content, or problems with running the game, this is the place to ask.
That's because killap's RP goes with DirectX libraries. You can either update your DirectX 9.0c through Microsoft web service or by downloading and installing redistributable package from link provided in Resurrection readme file, or simply try copying d3dx9_43.dll from your Fallout2 directory to Fallout2\Resurrection. (I'd suggest updating your DirectX)