Okay so when I updated my phone to 1.1.3 my summerboard icon was lost. Here is what I did to fix it:

1. First backup then edit the private/var/mobile/Library/Installer/LocalPackages.plist file to remove the summerboard program. just remove everything from the first <dict> to the last </dict> for summerboard only.
2. Backup then edit system>Libary>Core Services>systemversion.plist to change the version number from 1.1.3 to 1.1.2.
3. Restart phone then install summerboard again.

You should now be good to go!

I think I know what your talking about. I'm going to try it.

It worked for me. Now I have summerboard on 1.1.31!

HEY!!! I was also able to install Customize!!!!! Fucking cool!!!

Old News:

http://www.hackint0sh.org/forum/showthread.php?t=25163

i totally messed up and deleted everything in that file, could you please copy and paste, and post exactly what is supposed to be there, that would help so much

Arugh not sure why but i can't install Summerboard when i followed the guide.
It says i needed fw 1.1.3 to install.
When i revert back to 1.1.3 Installer crashes after downloading package.