Just installing your old applications and then installing Framework 2.0
(Beta) will not mean that the old application will start using the new
framework. You will have to rebuild the old application ( I'm assuming your
old application was written using either Framework 1.0 or 1.1) in Visual
Studio 2005 in order for the application to use the new framework. I would
try this on a test machine first as there will be some changes that you will
have to make (depending on how complex your app is) and besides that, until
the final code is released , you have no way to know if what you rebuild
with the current beta, will work in the final code.
james