Doris and Lisa,
Yes, I found the posts on the Adobe forums about the help files too. I tried everything in there. None of those things worked...
What finally worked for me was just manually placing the files that were missing into the proper folder. The same thing was happening for Adobe Bridge. That wasn't working either. I have no idea why they didn't install with the ps install. It makes no sense.
LenHewitt replied with this post that finally got me my help files and Adobe Bridge! I used solution #2, worked perfectly.

I'm a happy camper now!
http://www.adobe.com/support/techdocs/332006.html
Thanks for all your efforts to help guys!
Melanie