How to apply localscan_dlopen.patch ?

Forgive my ignorance, but I don't know c

and i don't know patch, though I've read the manpages and have some 
idea what is going on through the lines

i guess I could apply this by hand... but i'm guessing there's some 
wacky command line info i seem to be skipping over

i'm really eager to get this going, which is why i'm still struggling 
and haven't given up -- the docs are more than a little confusing.

if anyone can help me do this, i'll return the favor by writing some 
idiotproof docs that even i understand, to avoid people like me asking 
silly things like this.

much appreciation in advance