in that case you can either post the algorithm since you have it, and if you don't, then apparently you don't know exactly what he's talking about so in my book there isn't alot of difference between your position and mine.
if you think about it, you're making it sound like you know of an algorithm that you have access to that he can have that is similiar to the Gaptain Griffen one. if that's the case, you should give it to him.
it's like, if someone asked for the timer for my map or the masterhaosis timer and someone only had one or the other, but they are similiar things, then the person should post it.
when you say "i have no idea why he needs exactly that one"...it makes it sound like you have one that is very similiar. so why not post it? you make it sound like you don't want to help the original post.