I'm at my wits end trying to figure this out and I am sure it can't be that difficult. How in the world do you sync excel files to your BB? I do have Documents to Go, and the excel files are there, so why won't they sync to the BB?? This is making me crazy, somebody help?

They don't sync at all.
You're looking for a feature that doesn't exist.

You have to do it manually. You can email .xls files as attachments, or you can connect your BB to your pc and drag/drop files from pc to BB and back.