Hi Richard,
You'll find tht there is an entire Advisory Circular devoted to flight testing, and it has a reasonably good checklist for the first flight. That's AC 90-89B.
I do have to ask you though - have you read through AC90-116 the Additional Pilot Program Advisory Circular? It has guidance on all of the pre-flight checks that MUST be done to use the APP legally. It alos has checklists that you MUST go through to determine if the additional pilot is qualified. If you don't go through those steps, and document them, then you are not legally using the APP.
Please don't be insulted if you already know these things and are very qualified (as I hope you are) - but the fact that you are asking for a first flight checklist makes me wonder if you have gone through the APP process - because the requirements for being a Qualified Pilot pretty much make it a pre-requisite that you have done enough testing to already know what you should have for a first flight.
I'm sure you know that - but there are lots of rookies here that might not. The APP is not a ticket for a free ride for a second person - it is a process to ensure that if a second person goes along during Phase 1, they are very qualified to do so. If we, as a community, abuse the priviliedge, we'll lose it.