ActiveTweak is designed for the PC running ActiveSync. It allows you to do some things Microsoft never indtended. Some Features:

• Set yourself up as a guest partner and never have it prompt you again
• Remove those installs you accidentally clicked on that will be run on the next activesync connection
• Stop the Application Manager from popping up every time you cradle your device.
• Delete Partnerships without having to wipe out activesync and reinstall.
• Change the communication timeouts on the sync. Slow Computer? No longer a problem! (tho you might want to check for spyware, if it's that slow....)
  
  Don't worry, it's not really lime green. That's just the way the screenshot came out ;)
  
  Activetweak 1.2 ensures compatibility with ActiveSync 3.8. There was an issue in ActiveTeak 1.1 with AS 3.8 that is now corrected.

Download Link

source