Here's a list of what you can give them. I did some of this, but not all:
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Deadlines
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Copies of forms and addresses if doing it by paper
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Copies of essays
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Description of positioning strategy
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Main points for each school
• Samples of work
• Copies of evals
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Resume and how activities relate to b-school
• Canned descriptions of stories
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General instructions
The stuff in bold is what I handed over. I didn't give them all the essays for each school, just a couple that i felt were particularly insightful.
I think it's key that you explain how b-school recommendations are different from regular job references. If they aren't used to this, they might be surprised to learn the actual depth.