Correct, you need HDwall...with no S.
Here's the link to XDA:
http://forum.xda-developers.com/show...ghlight=hdwall
Just run the HDWall exe from wherever you unzip the file too. Also, I kept getting error messages when I'd try to convert. Found somewhere (don't remember where) that you need to copy the file cfc.exe into that same folder. I did a search on my harddrive and found the cfc file. One I copied it into my HDWall folder everything worked great.
Hope this helps.