I have integrated cwm with the oneclickroot script and zipped it all up here:
1. Enable Debugging on your phone (Settings>Applications>development>USB Debugging)
2. unzip the .zip file above on your computer
3. double click on the run.bat in that folder.
Your phone will reboot into recovery at the end of the script.
I took out the rooting aspect of the script, so use SuperOneClick to root your phone before using this script, if you don't have root.