mass importing coupon codes into membership

hi there i am using membership and i need to know if there is a way to import multiple coupon codes into membership? i will need to import hundreds or thousands of voucher numbers from a daily deal site to get redeemed when someone signs up. is there an easy way to do this without going into the code?
i one has to dive into the code where should one start?

please let me know.

here is the site:

thank you.