Can I install Windows 7 upgrade (from XP) to BootCamp?

or wait, as you said, you actually installed it from the mac side of things, using bootcamp?

meaning you inserted the disc, ran bootcamp, and there is an option to upgrade, without wiping out the old xp partition first?

for anyone that is still struggling with this here is my complete information and guide.

My laptop is a macbook 13" aluminum unibody (non pro, thanks apple...) 2.4 ghz, 2 gigs ram.

i had snow leopard with a bootcamp partition running windows xp pro 32 bit.
i bought the student price windows 7 upgrade (windows 7 pro) and burnt a disc of it. when I inserted the disc on the windows side it just gave me an error and won't let you continue. So what you have to do is insert the disc from the mac side, open bootcamp, and choose run windows installer. the computer will reboot and begin starting xp, but it gives you about 5-10 seconds where it says "press any key to boot from cd" or something like that. hit any key, and then proceed with the installation as normal. if you are running xp you will have to choose custom install. while it says this is a clean install of 7, it does in fact save all your old files (including all the system files, which is just a huge waste of space), so really you don't need to back up anything, but I guess you should anyway. but you can do this before installing from the mac side by just dragging the files onto your mac side from the bootcamp drive. midway through the install the computer restarts, make sure you are holding down the option key while it is starting up and choose the windows side to continue the install.

at first of course it will be very annoying as the bootcamp drivers won't be installed. as bootcamp doesn't yet recognize windows 7 this is very annoying to do. navigate to my computer and click the disk drive to eject the cd. then you can insert your bootcamp disc.

now navigate inside the bootcamp disc (again very annoying to do, as you don't have right click...)and you want to run the 64x installer file, but before you do so, right click and choose the test compatability option, and maybe even then choose run as administrator, but I dont think I did that second part. that will get the bootcamp drivers to install. the computer will reboot, and bootcamp will be working with all the drivers installed.

hope this helps anyone else in my situation.

On a different note, I was wondering where you bought your upgrade copy of Windows 7 Ultimate?

Thanks.

Just a note (I'm guessing you already did whatever you had to do): you can install Win7 with an upgrade disk on a clean, empty partition:

http://forums.macrumors.com/archive/index.php/t-802331.html

This is how I installed my Win7 from an upgrade disk with no previous Windows OS on my partition.