Multiple redirections ?

hi , we are building a website right now and we want to use this plugin to redirect our clients to multiple pages depending on the codes with one form it will be used for as a discount system and it seems that this plugin didn’t support multi code lists and multi redirections the clear this idea .. each client will have a code that have an amount of discount different than the other clients .. for example 75% , 50% , 30% , 25% etc so each discount rate will have a unique list .. and we want to use one form in the payment introduction page after the client use his code the website will direct him to the page that belong to to the list that contain his code .. can we modify the plug in to do that ? we have a low php experience :/ http://wordpress.org/plugins/response-promotion-redeemer/