This post is just a reference point for another post, a Subversion client is needed for downloading Crowbar, so I downloaded TortoiseSVN available here.
A quick install with the default options and I was away.
I created a new folder on my desktop called Crowbar, went into it and did a right click (TortoiseSVN is an explorer extension so there’s no program to run directly!).
TortoiseSVN -> Export
Then pasted in the trunk from the Crowbar instructions page.
I recommend you to take a look at SmartSVN Portable.
Thank Robin, although as Crowbar doesn’t seem to fit my needs it’s back to the drawing board here I think!