Uninstalling Ubuntu on a dual-boot windows XP home system

I currently have Windows XP Home installed and I instaled Ubuntu. I set it up to dual-boot so when my computer turns on I can pick which OS i want. After playing around with Ubuntu for a little while, I found out it's not for me. I like the interface and all that stuff, just not for me. I went into the disk management section of my Windows XP and deleted the partition for Ubuntu. I then restarted my computer and because the GRUB was trying to load, and trying to load the "options" as to which OS i could select. All that I got was a black screen with an error "Error 13" or "Error 17". (Note: It was only one of those two, I just couldn't remember which error it was, and it was only one of the two, not both.) I tried using my restore CD that came with my computer, but it's not a "Windows XP" CD, just a factory restore cd, so it doesn't not allow me to 'repair" or "fix" the Ubuntu partition. Luckily, I had the Ubuntu live cd, so I re-installed Ubuntu, which then allowed me access to the Dual-Boot screen upon start-up. My question is how do I remove Ubuntu and just have my computer automatically boot to Windows XP, while re-allocating the 40GB I set aside for Ubuntu back to my "C" drive on Windows without formatting the drive (I am in college and have a lot of school work and other important information on it.) I downloaded an "Acronis Disk Director Suite" which is made for re-allocating partitions and it allows me to "increase" my Windows XP partition from my Ubuntu partition, but I am afraid to run it because I have the feeling that I will run into the same problem (not booting directly to Windows) Is there a way I can uninstall the GRUB and set the default to Windows? If I could do that I could just delete the partition and try to reallocate using Acronis and hope that works. If there is any easier way to do it please let me know. Thanks - Cory