assigning a contract

[Chevis Duncan]

i have a verbal deal struck wth RE agent on short sale...i want to have my offer to purchase contract have an addendum or whatever it needs to make the contract assignable. my RE agent says he cant write that in that all he can do is say "see attached" and i can put it in, but he says to speak w a lawyer....i dont want to lose this deal over "time". what is the easiest, and quickest, and still legal to be able to assign the contract?