I added a refernce to Outlook 11 (MSOUTL.OLB). When used on another
computer, they get a compile error, with the MSOUTL.OLB file trying to be
found in the Outlook12 directory. When I try to open it back on my machine,
the file under Outlook12 is listed as missing, but it will not allow me to
uncheck that one and pick the normal Outlook11 I originally used. I cannot
even view the code without getting a DLL error. Any ideas on how to switch
them around so I can remove the offending code?

Create the file in Office12 temporarily until you can change the reference to
Office11. The after the workbook is fixed remove the file in Office12.