On your Win XP PC you need to go to control panel > uninstall program > and uninstall the BlackBerry Deviece Software from in there. If you try and delete the individual files you may be there some time and it will never get rid of everything.
I use CCleaner to unnstall my OS's between OS changes (and i do a lot).
Once that is done DM should not find any on your PC.
Also make sure you are NOT connected to the internet when you attach your device to the PC. It looks automatically for the newest OS it can use for your device, and you may be seeing that.
If you clean everything, run the install for the version you want, disconnect from the net and it should all go according to plan my friend.
Or if you cant see the actual program in control panel, reinstall it first, as it should be. Then you should be able to uninstall it.
PM me if you need any more help or leave a message here.
Last edited by Madasafish; 05-15-2010 at 11:43 PM.