1.0 to 1.5

Copy and past the whole Activision file to your desktop

Then use this link to download 1.4 to the Activison file still in program files
http://www.americansclan.com/modules.php?name=Downloads&d_op=viewdownload&cid=4#categorystart

Then again update your file to 1.5
http://www.gamershell.com/download_23036.shtml
it is a zipped file so you need to unzip it then install 1.5

After you are done you can open either 1.0 or 1.5 through the files but you have to move your profile info bc it does not transfer over from 1.0 to 1.5 or vis versa.