The latest S#arp architecure is 1.9 something, rapidly heading towards 2.0, and all targeted at VS2010.
But if you're using VS 2008, you'll have to use S#arp Architecture v1.6, which was the last version targeting VS 2008. But its best to use Templify to setup your solution, which is something they built especially for S#arp 2.0 but now has a retrofitted template for 1.6.
(NB: setup instructions for the latest S#arp seem to be in their wiki, here)
So, here's the steps to get S#arp 1.6 working from a vanilla Visual Studio 2008 install:
Install MVC 2
Install .NET Framework 4 (not needed for S#arp 1.6, but is needed for Templify)
Download sharp-architecture-126.96.36.199-templify-package.zip from the S#arp github site
Unzip the package and run copy-package.cmd to copy the Templify template to the right place
Make a folder somewhere
Right click on the folder and select 'Templify Here'
Select the "SharpArchitecure VS 2008 MVC 2 188.8.131.52" template
Enter your project name
Press Deploy Template
... and voila, you have a VS 2008 S#arp 1.6 solution.
To get the initial test running, you also need to create a blank database and edit (project).Web/NHibernate.config.xml to point to that db.
Most of the templify stuff, and generation of code using the CrudScaffolding is covered by the S#arp documentation for VS 2010