Here's a link to a project to get 4x4 quicklinks in people tab for sense 2.5. It's from xda and all credit goes to it's developer.
http://forum.xda-developers.com/showthread.php?t=666165
There are a few different versions of the cab and reportedly it's not working for everyone - so make sure to read the post.
I searched forever for something like this and found this by accident after I had stopped looking.