There's no real "process", besides that you have to convince a moderator to do it

.
I guess you mean Tholal's naval AI thread?
If so, then I can't really see why it should be a sticky. Seems to be a normal modmod, like the others too.
Yes, I know that Tholal has release the latest fix for FfH2, and that he's good at modding, but I can't see at the moment why his thread should be a sticky, but not e.g. the one by MagisterCultuum.