staking practicalities

[mozz]

a good and trustworthy friend of mine who i consider to be my equal (poker skills-wise) is short on cash due to unexpected expenses. i am considering staking him but before speaking to him about it would need some advice regarding the specifics.

so, what i need to know is: what is the most common set up for cash game staking? for example: percentage-wise, how much should i demand of the winnings?

i would appreciate it if people avoid posting comments like: "staking is for losers", etc. i am not interested in the normative aspects of staking. strictly pratical advice please. for example: how would you u set it up at pokerstars? how do u keep records?

thank you.