Short answer? Not specifically. As the HOW RPG can be played skirmish style already, it did not occur to me to create one.
That being said, I can see where someone just wants to play a quick battle and HOW RPG contains nifty bits to add to HOW skirmish. So for those interested, here are the untested rules:
As to conversions from HOW RPG to HOW Skirmish? Well that would take a bit of work but off the top of my head I think you could:
1. Get rid of EN
2. Divide each of the RPG character's ST, IQ, and DX by 4 and the result is its HOW skirmish value
3. MV translates straight across
That will mean a 6 or higher rating on many creatures ST. Take any ST above 6 and turn it into HTK for that creature. Yes that does mean the creature can "auto hit" in melee, but that is what makes a monster monstrous!
Spells would NOT cost EN any longer--but the EN value of the spell now becomes the Point cost necessary to use it. Not all spells translate very well, and if a HOW RPG spell sounds similar to something in HOW Skirmish, switch the RPG wizard's spell to the Skirmish variant.
Not perfect, but just dangerous enough to have fun with!