Co-Existing with MSDE

Can SQL Express reside on the same server as MSDE and both run at the same time (different apps)?

I have one app that runs on MSDE and a new to be developed app by a vendor that needs SQL Express.

Thanks

JB

Yes, that is possible. When you start the SQL 2005 Express setup, it will detect the MSDE and ask if you wish to upgrade or install a new instance. Choose a new instance.

You may wish to read in Books Online about the topic: "Instance Naming Page"