Burning Microsoft Office onto a CD?

I need to purchase Microsoft Office for my new MacBook, and even with the educational discount and the rebate it is still $100, and for a college student this is a lot. Soooo... I was hoping to buy it, install it on my computer, and then sell it (and the two codes left) on eBay. But I would like to back Microsoft Office up on a CD just in case. (I am buying it, after all.) How would I go about doing this? Just dragging "Word" and "Excel", etc., from the Applications folder directly into a Burn Folder? Would those applications fit on a typical CD? (I don't have the DVD burner.) Thanks.