Can I travel to the US via the Visa Waiver Program days before entering the US on a G4?


Registered Users (C)
Hi everybody,
I have just received a G4 to take up a position in an international organization. However, it will take about two weeks before my flight will have been arranged by the organization. In the meantime, I would like to travel to the US on a Visa Waiver Program to visit some friends on the West Coast who invited me and who will soon leave the country. I plan to return after about a week and then re-enter by official travel on the G4. Is it possible to travel to the US on the VWP, not using my G4 (even though its valid) and re-entering a week later making use of my G4? Any advice would be appreciated!