MS Word 2000 -vs-Office 2003

Using XP on home computer.

I have a load of large documents and all composed in Word 2000.

I also have Office 2003 exe sitting on my computer.

Ms continually sends me updates for 2003 but fails to install them, probably because I have not installed 2003.

If I install 2003, what happens to my documents in 2000? Will they reformat or destroy my documents? If I lose them, I lose my job and income. This is scary. :cry

I'm quite content with Word 2000 and not tempted to update to any of the newer versions. If I delete Office 2003, how will it affect things?

As I said - scary - especially when I'm not technically inclined and tend to stick with what I know.

Thanks for any help you can give me.

Lavender