Custom Sounds?

Hi, I was just wondering if it's possible to have custom sounds. For example, if I wanted the SCAR to sound louder or softer or completely different.

Currently opening the iw_21.iwd file in pakscape, I can find the Flashbang sound, i've replaced that one with one that is completely silent so im not deafened as much.

That said, I can't seem to locate any of the others. Where has IW hidden them?

If I could find some, I'd definately make a soundpack for people to use.

Thanks

I think it's not possible, but you can avoid sounds to rename the miles folder to dismiles..