Hi there, saw your project and I think I can help you out.
From you're description I am assuming you want the excel sheet to calculate the each golfer's running handicap, updating the handicap every time they play a round and the data is entered. Plus, you want it to automatically double the score for 9 hole rounds when calculating handicap.
If so, I can have that completed for you in 2 or 3 days.
If you need anything else, like the data you already have entered, or the excel file to output the handicaps onto a separate sheet I can take care of that for you as well it'll just take me a little longer.