I got the chance to use Ubuntu a few days back and oh, loved it. I got Ubuntu Feisty Fawn 7.04 dvd so that I can install it. I am currently running on Windows XP. I need help going about installing it on my Inspiron 700M. The thing is I want to make sure, I can revert back to windows, if i find ubuntu inconvenient. Thank you in advance for the help!
Another thing that you can do is set Ubuntu to install in the free space of the hard drive. PLEASE MAKE SURE YOU DEFRAG YOUR WINDOWS PARTITION FIRST! Failure to defrag first CAN result in data loss. Ubuntu will load its own bootloader, allowing you to choose between either Ubuntu or Windows XP with ease (some additional work needed, from what I've seen, to make it work with Vista).
One of the options should be to use the free space on the hard drive for the installation as a guided setup. There will be a slider there, which should be positioned to allow enough room for your Windows partition (part of your hard drive) to exist peacefully with a bit of room to spare. The default setting should work well for the average user.