MS Outlook and Outlook Express On Same Computer

I use both MS Outlook (<font color="green">MSO</font>) and Outlook Express (<font color="blue">OE</font>) on the same computer. I want to continue using Plaxo with my <font color="green">MSO</font> but not with my <font color="blue">OE </font> on the same computer. Is this possible?

At least this is the best resolution I can come up with because - after I have my <font color="green">MSO</font> and Plaxo working together and synchronized - when I turn on my <font color="blue">OE </font> - it attempts its own synchronization and it creates duplicates/deletes contacts on my computer and/or my Plaxo.

Well the easiest way might be to uninstall and reinstall Plaxo. When you start Outlook you can register as an existing user, but when you start Outlook Express, simply cancel the registration dialog. Then Plaxo shouldn't be doing anything inside Outlook Express.