How to become instantly popular

I'm running a project which involves hiring some smart but not necessarily experieneced people for temporary work, on what I consider to be a vastly over-paid daily rate.

Untill you have this kind of power, the power to engage people and pay them...you never know just how many friends you have. Suddenly everyone you know at work is being very nice to you. And by the way, do you have a job for their brother/sister/cousin ?

Fair enough I suppose but today this rather odious character hounded me...actually followed me out of the buidling. Last week sometime, my collegue A introduced me the odious character. As I was on sick leave at a critical juncture in the project, A helped out with a lot of the hiring. This guy's sister is on the wait list of people who could be hired if a position came up. Clearly A had had enough of the guy hounding him and since it was my project, passed him on to me.

I'm quite tired today and had my mind on other things (like sneaking off to somewhere will a good net connection so I could chat with the bf) and this guy just wants to annoy me about how I should hire his sister, how she has been recommended by the Rector, how she needs a job (her and couple of million other Rwandans), and how I should help him out cause we are collegues in KIST (he works in some satelite centre upcountry). I so do not want to deal with this guy. To top it all, he follows me into the office to "greet" the director of my unit, a move clearly intended to intimidate me. I'm tempted not to hire the girl cause he was such a pain in the ass!