Now you can download the trial version at : http://www.microsoft.com/visualstudio/en-us/download 

And i installed side-by-side with the existing VS2008 with no problems.

After installed IIS7, some people might find that classic ASP or even ASP.NET are not be able to run on the new IIS. Example test, http://localhost/test.asp or http://localhost/test.aspx

By default, the IIS is not configured for classic ASP (crab!), but do not worry, you just have to follow the simple 2 steps:

1) Go to Control Panel > Programs and Features > click Turn Windows features on and off

2) Navigate down the tree of features and make sure ASP is checked(checked ASP.NET if you want to run ASP.NET too). It should be under Internet Information Services (IIS) Manager > World Wide Web Services > Application Development Features. Press OK when done.

p/s: There are many reasons to cause the classic ASP & ASP.net are not running well in local PC. Normally this solution is apply to those who installed the new IIS.