Modding help - changing the sounds played in a map when clicking a unit

[Lord of Nukes]

I'm assuming UMS is the best forum to place this in?

I was wondering if someone had a guide or could do a quick write-up about changing the soudss in a mod. Sound editing is one thing I haven't done much with modding, and I don't know how to change the soudns a unit makes when you click on it. I know how to make it play other sounds from StarCraft, but as to how to make it run an entirely different sound I'm not sure. There must be a way without having to change the sound in the install.exe or Star.dat, some type of file that can be put into an mpq with the new soundto make it play instead of the normal sound?

[Wing Zero]

plz wait whille i brush off the dust of my MOD/TC Guide
I know the sites just wait a bit whille i goggle htem

i have failed but
http://www.campaigncreations.org/boards/ ask tehse guys htere reallygood

[Lord of Nukes]

Thank you.