Jans instructions are easy to follow.
I made a minor enhancement in the code on my install so I have an info box open on a map marker when the page loaded. I contact Jan about making this a configuration option in the next release. I got a prompt and positive response to my suggestion.
Having looked in the code its quite cleanly written.
Only recommendation to people using this to define a fixed pixel size for you map as I had a problem in ie 7 with % size. This is a browser issue and not so one of the component.