Worth testing before trusting, but it SHOULD work with linked XLS files as long
as the XLS and the PPT land in the same folder.
But you can embed instead and everything they need is right there in the PPT
file. Let's modify that: everything in the whole XLS is right there in the PPT
file, so if you don't want them to have access, you'll want to copy to another
XLS then embed from there.
And James, to embed the XLS file, you'd copy your data in Excel and then in
PPT use Edit/Paste Special and choose Excel Workbook Object. Mind you, that
embeds the entire worksheet, as Steve was explaining.
You could get the same result using plain ol' paste in most versions of PPT.
But to be on the safe side, use Edit/Paste Special.
Oh, you could *also* use Insert/Object/Create from File and insert the Excel
file thataway. Lots of ways to get to the same place. (Where did you say you
want to go today? <g>)