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well i am not new to the linux/gnome thing, but i decided i want to have Linux Mint instead of Ubuntu. I like ubuntu but i feel i want this one instead cause it seems much simpler than ubuntu. So to the point, I want to replace ubuntu and put linux mint on the SAME partition as ubuntu ( I also have Windows XP on another parition which I still need). Can I just install it from the Live CD and put it on the same partition? Though another concern I have is that what if the GRUB bootloader doesn't show windows XP if that were to happen what could I do? there is really nothing for me to back up on ubuntu so no worries aboutthat. thanks in advanced!!
I don't see any need to reformat the partition in Windows. Just tell the installer to use the Ubuntu partition and it will be reformatted during the install process. Grub will add a Windows entry to it's menu during the install process.
As with anything major, back up your data before proceeding