BFM Script Modifications Works Needed Urgently

I have Butterfly Marketing Script v2.13 (BFM) and used for one of my multi-tier program. I need some extra features which the original BFM script does not come with. I need someone who is experienced in PHP/MySQL and this kind of membership script, that can modify the BFM script to meet my additional features. Below is the features I need : (1) If more than 1 tier is chosen, there will settings available in admin area to set different level commission value, either in % value or fixed amount. Example, if I chose 2 tiers, I will be able to set Tier 1 commission as 20% and Tier 2 commission as 5% (2) Ability to perform Group Matching Bonus, which is most MLM script have this kind of features (3) To show sales amount of each members ( I already have a module that can Show numbers of referral, can use this module to calculate the sales amount, and then show it in members area) (4) Integrate my local payment gateway (credit card), the payment gateway documentation provided is the API code. I am looking for serious programmer that can do all above modifications. p.s. I can provide you the admin area login if you need to look around at the script.