BCDEDIT changing defaults

Hi everyone.

I have a fully up todate pc that has XP P (32bit) on one partition and W7 P (64bit) on the other partition. (same HD)

Both Operating systems are fine.

My problem is that for some reason between switching the pc off and back on the following morning the mouse and keyboard do not work so I cannot tab between which operating system I want. (the keyboard and mouse work fine once either operating system is loaded, so its not faulty gear or connections

Set that aside for the moment, as my real question is..

Last Time, I let the pc default boot into W7 and used BCDEDIT to change the boot so it defaulted into XP, now I want to change it back to default into W7 how do I do this in W XP ? Please.

I will sort the keyboard and mouse out later but obviously I cannot get into the bios either.

Thanks Duzzy but as I said W7 is 64bit and XP returns "not a 32bit programme" (even though it is in the system32 folder.

lehnerus2000 thanks for your reply, but with no keyboard and mouse I cannot get into BIOS and dont want to at the moment because if I return bios to default, by, say changing the battery, my machine might not start and that would be a serious problem, at least everything is working om XP and I can read the W7 partition even if I cannot boot W7.

I have by the way tried other keyboards and mouses ? no difference but they all work fine once I boot into windows my Mouse and Keyboard are USB..

This mobo is Rampage Extreme mk1 and only has a mauve keyboard connector and a keyboard direct into that does not work either.

Keep the help coming please !!!!

Thank you everyone for your ideas. I'm going to have a go with EasyBCD first, (legs and arms and fingers crossed) (hope I'm not getting in too deep for my level of knowledge. They also have a really good programme called iReboot that will make my life much easier too. Now if I could only solve my keyboard and mouse problem I wouldnt need to do any of this, its really odd Monday it was fine, normal shutdown, Thuesday morning nothing, if I dissconnect the USB Mouse and Keyboard and plugged another one I have into the mauve connector the mobo says "keyboard missing" or not detected" cant remember which. cant believe its the battery, cant check the battery, so dont want to re-set the bios by removing battery and altering the bios settings just incase its something else and I screw up big time, otherwise a perfectly ok system.
anyway thanks again for your suggestions, its a lonely old world out here when you have problems so I'm very grateful for your help.