Have you try inserting a cookie grabber? then sent him a link or something like Joe said. Or some script that grab/record key strokes. I'm not a computer wizard and never attempted to hack someone, but I'm sure if you pay/offer someone the "right" price, I'm sure it can be done. If he truly is your friend, I wouldn't do this, kinda wrong and poor taste
My First Guide on [GM] Score Sending
My Second Guide on How to AoB (Array of Bytes) Habitarium