Vista - Need Mpeg Layer3 for Win Vista Hm Premium

I'm still trying to get Mpeg Layer2 on my Vista machine. Help Please.

On my XP machine I have Mpeg layer 3 as an option for compressing audio
files. How can I get this as an option on my Vista Hm Premium machine and
how do I load it so it shows up as an option? Here is what I have done so
far and it hasn't worked.

I downloaded and extracted the file: lame-398.tar.gz to a temp folder but
now I'm not sure how to install it or what to do with it. I'm not even sure
if this is what I want to install. Can someone tell me what I need to do so
I can get mpeg layer 3 as on option for some of my programs that needs that
compression option? Thanks for the help.