working with projector

[LINGTIAN KONG]

Hello guys, 

I have a very stupid question, haha. I will have a interview shoot next week, and it will be my first time working with projector. So I have some question regarding working with projector, fist of all, would I be able to use projector as my KEY light? Second of all, what should I be aware of working with projector? (I am worry about the flicker) Third of all, I do not know if I could use projector as my FILL light and have my own lighting unit play as KEY light? Guys please share with me some of your experience working with projector!! Thank you so much for taking time read my stupid questions, really need some help!