Applying the forcedeth patch to the 2.4.24 source from kernel.org?

[Joseph Jones <joe@bumpycarrot.cjb.net>]

Could anyone tell me how to achieve this lofty goal? I've never applied 
a patch before in my life, so if somebody could tell me how this is 
done, I'd be very grateful :) I could do with being pointed at the 
correct patch (amongst other instructions), since I don't have a clue 
what I'm supposed to download.

Many thanks

Joe