85174 PHP script update

I want a programmer who knows PHP and is familiar with memberships websites to add and few changes to my script. I have a membership site where I can give a bonus to people who signup and a bonus for people to signup others. What I want is a seperate payment account which shows the bonus that I want to give in a Bonus Pending account in the members back office. This account will only serve as a Bonus Pending account. When the actual bonus goes into the real account, (after certain conditions are met), I want the Bonus Account to reflect this by decreasing by the bonus amount. For example, I want to give a bonus of $5 per each free referral. When a member makes a referral they get a bonus in the Bonus Pending Account for $5. In order for the Bonus to be paid to the referrer, the referral has to generate at least $30 in their own account. Once the referral has accomplished this, I want the referrer to get a bonus of $5 in their real account. Then delete the bonus in their pending Bonus account. Plus I want a small addition to the admin section of the website, there is a certain amount of advertising credits assigned to each user when they signup for free. I want to be able to see the amount of credits left and change the amount. I also want someone familiar with Sub Ids for Ad network tracking. This will lead to ongoing changes if the work is done well. If you have any questions feel free to ask.