Be careful with this mod, once you delete it your sounds go messed. Possibly it's a bug in the game, but after I removed the pk file from my base folder flamer sound etc sounded awful.
I don't know how you managed that - deleting the pk3 just reverted trem to the original sounds for me - as Odin said additional pk3s do not modify existing game content. Did you do anything other than place the sounds pk3 in your base?
