There is a toolbar option on my site but I can't recall without testing whether or not it will work in a merged help scenario. Might be worth a try.
Also look at www.wvanweelden.eu as there may be later stuff there. Willam is the guy behind the versions on my site.
Let us know how you get on.
See www.grainge.org for RoboHelp and Authoring tips
Thanks very much.