Firstly, apologies for the error. It's fourball not foursomes...as per my original post in that regard.
In a four-ball (or better ball of partners) match, there are two teams of two players. Each player plays his own ball, and each team uses the best score of its two players. The player with the lowest handicap plays at scratch. The remaining players adjust their handicaps by subtracting the best player's handicap from theirs. For example, your partner is a 6 and you're a 15; your opponents have handicaps of 7 and 9. Your partner plays scratch, you get 9 strokes and your opponents get 1 stroke and 3 strokes, respectively.
Easiest way to do it is to play to normal stroke index
in other words if Gorilla boy and Agro vs snorkel and Koiom
if Agro has a 6 net 4 and gorilla has a 5 net 5 they would beat a 6 net 5 snorkel and a 5 net 5 from Koiom .