I dual-boot Windows XP and Xubuntu 10.04
If you use the alternate install CD for Ubuntu (which I use because I don't like installing OSes with GUIs), one of the first things the GUI has you do is partition your hard drive. If you select "manually partition," it allows you to resize a partition in order to free space. Then, you can select "automatically partition the free space" and the base Ubuntu system will install.
It would be better to resize the I drive rather than delete it, because your individual user settings for your Windows OS are stored there, and I don't think you'll be able to log in as "on campus" otherwise. You should defragment it a few times and back up all your important files (on both your C drive and your I drive) before you run the install disc just in case something goes wrong.
Hezekiah Michael Sudol
Webmaster, Drew Alliance