See here (http://www.microsoft.com/downloads/details.aspx?FamilyId=B273269C-97E0-411D-8849-5A8070698E4A&displaylang=en) for the install guides which call out the software prereqs you need.
Basically, you need Windows, SQL, .NET Framework, and optionally IIS and SharePoint. You do NOT want VS.NET on the QA server, as the BTS 2006 Admin Console has all the management capabilities that used to be in VS.NET. Most IT depts. don't like dev tools on the server, and now you don't need it.
You can choose to install only the components you want (e.g. no BAM, no BAS, no EDI, etc).
You'll probably have to look at scripting (WMI) the parties update if you want that done automatically.