Anyway I've allready got the awnser - I PMed somebody and he helped me
Anyway THNX!!!
now another thing:
For anywone who will like to know - you can do it with WaveLab in 2 ways
1) Opening a new file and setting the things said above then adding the file you wanna change settings to then saving (if the original file was 44 Hrz you'll need to increase it's speed using windows sound recorder).
2) save the file you wanna change and in the down section of the window you'll see your current settings (Stereo/mono, bits, khz)
Now change to the settings writen above and save!!
(P.S: Make this a Stiky so anyone who will like to edit sounds will be able to do so...)