Looking for the wallmod

I saw someone running through walls like they weren't even there, and he was saying he had a clientside mod that let him do this. Does anyone have this mod or know where to get it?

I think it's just another Map-Modification...
You need to replace one map with the another one.
(This only works with fixed buildings not with Player-Houses)

Another way could be to make sure that the buildings aren't loading (lag, packet editor etc...)

A small part of the SWGEmu Documentation which is somewhere out could help you to understand how to modify the Network-Traffic to have much fun :)