Version 0.21 is broken.
Use V0.22 (at the same link www.customsims3.com/forum1/wbin/SpViewDL.html). Since your install was successful, you only need the update package, which is much smaller.
Sorry for the inconvenience, but I broke the decompression when I made the V0.21 update (the first post-game-release version).
<* Wes *>
[Edited by WesHowe, 9/9/2008 2:18:40 PM]
Yep that was the problem and I was able to edit the file correctly. However after repackaging it, the changes doesn't seem to be doing anything, did anyone else get it to work? Did anyone do anything other than the steps outlined already?
[Edited by yongke, 9/9/2008 4:33:22 PM]