Just tar'ing the directory structure and telling kde to install it returns the error that the file is not a valid icon theme archive
**edit**
If anyone is interested, I figured out what to do...
I had installed the noia theme as my base, then I went to $HOME/.kde/share/icons/"installed theme"/ and replaced the icons there with the ones I wanted. I then edited the 'index.desktop' file and put "Custom" for the name and edited the comment...
That's all there is to it....
Now.... where can I find a cool trash icon? I saw someone mention they had one with animated flies when full....