Saving throws and healing "damage"?

I would just build a separate effect for the Negative Burst Damage. Make it an "At Will" Ability but have him/her burn a positive use charge at the same time with no targets for tracking.

 

I have just made two effects. One to heal damage and one to cause damage. When I use the Cleric Channel ability I just chose which one to use and load it. That way you don't have to have two abilities with one being at will and having to "burn" the other.

 

I use 3 different effects for this. One is uses per day, another is channel positive to heal, and channel positive to damage at will ability. The uses per day one has no function other then as counter. I have my players use that before using the at will effect. I think this is the best and most accurate way of doing this in d20 pro. A lot of people think Channel is supposed to heal and do damage at the same time, but it does not. You have to pick what you are doing healing or damaging you can not do both according to the rules. the undead should not be getting healed any way because your player should not be selecting them as a target when healing is in use. 2 ability is the by rules way and correct way to do it in the program. d20 pro does not bother keeping track of your actions in a round you can do 1 to 80 so having the 3rd ability for a use counter is effective way to keep track of it. unfortunately for spell that do healing and damage to undead in the same ability like cure light wounds mass, ect. you have to apply the damage and healing separate. in cases like that I suggest adding the spell in free form casting section as the damaging part of the spell. the player can cast use up both when casting the single spell.