Burn iso To A DVD?

I just built my first PC and am installing Windows XP on it at the moment, so I can apply my Windows 7 64-bit OS. I bought an online version and have an ISO available which I would like to burn to a disc and install the OS from there. The problem is its a 3GB file and I've never burnt an ISO onto anything but a CD--can you eveb burn them and install them via DVD?

I have a program called imgBurnCry0Tek

-Start ImgBurn.

-Click "Write image file to disc"

-Click the folder icon with the magnifying glass at the top ("browse for a file...") and browse to/select your ISO.

-Insert blank DVD.

-Click the huge "Write" button at the bottom-left.