Autosurf script modifications

I need a Autosurf script modified. The present daily earning system of a fixed percentage has to be changed to a profit-share system. ie: the money coming in daily gets divided amongst the amount of upgraded members after a small percentage is taken off for admin, and this remainder is divided amongst the members in the form of a percentage earning. This impacts quite a few areas of the program. There won't be a fixed expiry date any more, instead the adpacks will expire once the member reaches a pre-determined ROI. The shared profit percentage will be worked out on the previous days takings, so that the members get paid automatically after surfing the required sites.