Visual Basic Script from file?
 

Is it possible to set a scripting step to run a file (or ideally a function in a file).

Our various build scripts often use the same vbs scripts but run on different machines (so global scripts aren't an option)

I may not quite understand your question, but why couldn't you use global or project scripts for this? Global scripts can be loaded dynamically (for instance after retrieving from a common source control location) from a build: http://www.kinook.com/Forum/showthread.php?threadid=36

ah. excellent. I think loading the global scripts will work then. Thanks!