Having been involved with acceptance programs before and after suitable training, I can only agree with john_tullamarine. Be aware that while the manufacturer may well have good intentions, when non-conformities or problems occur, the financial side of business can make those intentions vanish very quickly.
There are smart airlines out there already that require acceptance test crew to undergo training. The cost can be insignificant compared to the potential legal and schedule implications and the asscoiated financial costs of a problem found too late.
I have four pieces of advice for you:
1. Get adequate training.
2. Test eveything that can be tested, no matter how minor it appears. It does not have to be you to individually test every item as long as someone representing the customer tests or witnesses every test. It is easier to fix a discrepancy prior to acceptance than tell your bosses the aircraft is grounded after acceptance.
3. Know how all the systems are supposed to work. Not just a line pilot's knowledge, but how the system should work to pass certification. There are some items they will tell you that have been ground tested and don't need to be flight tested. Sometimes this is the case, sometimes what they are telling you is utter nonesense. 99% of the time it is because the person telling you ground testing is adequate doesn't know any better.
4. If your employee won't pay for your training, un-volunteer yourself from the acceptance team. It is not woth it.