Thank you very much, Diane. Unfortunately, I made the call to Microsoft this morning before I read your response.
Since I did, I might as well let others know what my experience was, hopefully help someone else.
Probably the most important first fact for anyone considering this is that I had to pay $99 for this call. My Office 2010 is out of warranty-can't recall how long warranty lasts.
I paid it.
For my $99, I got pretty good service. I got a man in Manila, Phillipines who spoke pretty good English. We had a 70 min call, during which these things occurred:
1. I explained my situation: Lenovo x201 Tablet, Win 7 x 64, Office 2010, e-mail accounts via Time Warner Roadrunner and Gmail. I use the tablet as my main personal computer and send and receive e-mails both from a wired TimeWarner Cable connection at home, and via a Verizon global Gobi 2000 embedded card on the tablet (fixed monthly fee) so that I can have broadband internet connection almost everywhere. I also want to get the same e-mail on my iPhone and iPad at times.
Some infection killed my Tablet about a month ago, at which point I discovered that my disk image backups had stopped working 1-2 weeks earlier. I resurrected it by saving data to an external drive, formatted hard drive, then factory reinstall, then reinstall Office 2010 from original disks. I then created a new Outlook profile and tried to pull in the old .pst data file from its storage spot on external drive. I couldn't recall what all of my previous e-mail settings were. I was left with an old .pst file, set up exactly my way, with a 10 year history, and a new POP-3 file into which all my e-mails were going.
After some effort before my help call, I was able to get both data files next to each other, and to select my old file as the default file. At that point I could see both the old .pst folders and the new .pst folders in the left hand Navigation pane in Outlook 2010. I could use all my old calendars, contacts, Tasks, Notes, and just had to select the Inbox from the new .pst file.
2. He explained that no new .pst file is created when you create an IMAP e-mail account. I couldn't really understand the explanation, and will have to read more about it.
3. He created a new account, using my Gmail account, IMAP format.
4. We discovered together that you cannot direct new IMAP e-mail into my existing .pst file, which is set up as a POP-3 account.
5. His suggestion was that several times a day I manually move all my new e-mail messages from the IMAP account to my accustomed old POP-3 .pst file. I declined that solution.
6. We bailed out completely on IMAP and set up a Gmail Pop-3 account.
7. He showed me the obvious way to point mail coming into that new account to fill my old .pst file instead of some new file.
8. With all my earlier efforts, I had created a lot of extra calender, contact, and task folders. He showed me how to eliminate them.
9. He helped me merge all my contacts into one single folder. I will tag and refine that later.
All in all, I thought I got my money's worth, if for no other reason than that most of that 70 min was answering my questions. When we were finished, I felt like most of the answers were obvious and I could have figured them out by myself. But, as I mentioned, exhaustion and time constraints had taken their toll and I just needed someone to fix it for me.
I suspect that, having bailed out on IMAP, I have no way to get mail on my iPhone. I'll wait 1-2 months to tackle that. He understandably had no interest in helping me use my Apple products.
Thanks, Diane, for your replies, and I hope my story helps someone else.
Leander