Changing unit vioces to custom

I have some vioces for a Unit but I don't know how to give the unit my vioces can you help me?

I'll be doing a tutorial on this someday, but here's a quick version.

Get an MPQ Viewer (e.g. WinMPQ), open up the main WC3 MPQ (i.e. the biggest file in your WC3 directory) and find the .wav's of the unit you wish to replace.
Make a new campaign file in WE and in the Imported Files import the wav's. Then double click each of them and add the path name as like the one from the MPQ (e.g. orc\unit\grunt or whatever). Import a map with the unit and test it out.

ok thanks :)