Texture help.

[Chengi]

Just out of curiosity, how do I replace textures, or do I have to add my own?

 

[Monster Iestyn]

To replace textures, just simply rename the new texture so it has the same name as the texture you want to replace.

As for adding new textures, see this page:
http://wiki.srb2.org/wiki/Custom_Textures_Tutorial_-_XWE
...or this page:
http://wiki.srb2.org/wiki/Custom_Textures_Tutorial_-_SLumpEd