Hammer 3.5
Just copy paste it into its own directory and your set. I went ahead and left SHLT in there, since I don't have the installer anymore I just copy pasted my hammer directory into a zip. If there are any problems please tell me, I want to encourage people to keep mapping for the ever aging GoldSrc. engine.
(Please note that for some reason I have the 3.4 help file and not 3.5, I hope this is not a huge issue and if I can dig up the 3.5 one I'll include it.)