No, you'll need a disc, or at least a loan of one.
Or else you could download (free) [broken link removed], which is similar and can open a lot of MS Office files (76Mb download, though — you'd want a broadband connection!).
ribena, i think the original post was how to copy the applications rather then a doc or spreadsheet. Dr M is right, you'll need a cd or go for one of the free options.
Personally, I would just borrow a disc from someone. But if you do want to buy it again new, you can get a 15% discount if you're a student or teacher.
You can get Microsoft® Office Professional Edition 2003 for €79.99 [broken link removed] (for example) — but as a download.