Alternatively you can get also get RapidSVN.
1. Visit the homepage:
http://rapidsvn.tigris.org/
2. Press the "download latest release" and get the .exe file if you're on Windows.
3. Install it.
4. Visit the documentation page and read the checkout instructions:
http://www.rapidsvn.org/index.php/Do...a_Working_Copy
After following those steps you'll end up with an Ace2 folder with all the libraries somewhere on your hard drive
(you will choose where: Desktop is as good a place as any)
You can then copy the entire Ace2 folder you got to your AddOns folder (if you intend to run the libraries disembedded)
or go into the Libs subfolder of your Ace addon and look what libraries are there,
and overwrite with the WotLK compatible versions.