Multiple Build definitions in VSTS 2008 help needed

I was wondering if the following can be done in VSTS 2008.

I have a main branch and several branches where many code change will be going on. Is there a way to build a required branch on demand?

Also I have many labeled versions of code and a main branch, is there a way to build a labeled version o开发者_Python百科f the code on demand?

TFS doesn't support this out of the box. I've done something similar where I created a build definition that read an XML file for what it was to build and deploy and then it perfomred the necessary actions to complete that. It sounds like you would need a similar thing.