Hi if you have Own3mall installer http://www.x-null.net/forums/showthread.php?2383-BETA-Medal-of-Honor-Downloader-(Install-Package-and-Manage-Mods-All-in-One) and manually install Pakradar as normal it wont work - this is because Own3mall has not added support for pakRadar yet .
I have Messaged Own3mall on X-null and he will be adding support for it - In the mean time you may need to disable the auto installer and install Pakradar manually
I have only tested it on windows 7 as above and fails when used with the auto installer
Watch this space and will update once the auto installer has added support