I've added a new segment that permits sketching an arc segment. The path length is derived from trigonometric formulas and is "close" enough for its purpose, I assume. You'll have to decide for yourself if you choose to use it.
Thanks to Mr. Raiz for the formula I needed to do the calculation. It is setup to use as a middle segment as I assume that it probably wouldn't be used to start or end. Arbitrary assumption perhaps. The "hard part" (meaning time to work it out is short right now) is getting the arrow to point in the correct direction relative to the arc.
To download the new 2009 version CLICK HERE 2009.
To download the new 2008 version CLICK HERE 2008