Outlook 2007 Disappeared!

I installed the office Beta (Professional Plus download) about 2 weeks ago.
Everything was working ok until I tried to install the Data Analysis pack in
Excel today. During the installation of the Add-in I got a message stating
“the above programs need to be closed to complete installation� with retry,
abort and ignore. I was able to close Word but it would not let me close
Outlook or the open Excel file. Tried retry got the same message, still
couldn’t close Outlook so I clicked ignore. Installation of addin gave no
other hints there was a problem.
I went back to Add-in’s in Excel and the data analysis for regression was
not there (though Solver which in installed at the same time was). Rebooted.
When it booted back up Outlook Beta was gone, (the 97 version I had in
previously was there), and still no data analysis option in excel. Searched
for outlook exe nothing except old version, tried to repair installation, no
good. Tried to reinstall altogether, but now on add/remove programs within
the office beta installation it says Outlook is not available.
Any idea how I can get Outlook back? And being able to do regression in
excel would be nice to.
Thanks
Brandi