Obviously, get her settled in first for a couple weeks at least before attempting to breed. If she was eating before she was shipped, try and get her to eat at least twice before trying to breed her. Then you'll know she's at least settled in and going to be fine before you put her in a stressful situation with a strange snake in a strange place and on an empty tummy.
I might just be paranoid, but that's what I'd do (will do when I get a new female in another month or two) before breeding a new female. In a perfect world, you'd quarantine her in a separate room for at least a month or two prior to any attempt at breeding anyway.
As far as cooldown/breeding - I'd toss them in together first to see if they go at it, and if they don't, then try cooling down and other techniques to see if that does the trick.
Good luck!
~jenny
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"Polysyllabism in no way insures that what you're saying is actually worth being heard." - Blake (an e-friend of mine)
"I have never made but one prayer to god, a very short one: "O lord, make my enemies ridiculous." And he granted it." - Voltaire