You do it using the two light tabs on the top tube of the bumper. Just get a nice long bolt, put a nut on it halfway down, place hi-lift onto said bolts(the nuts you just put on will keep the hi-lift from actually hitting the bumper) then spin on some wing nuts and you now have a hi-lift mount on your bumper. The downsides to this are the jack is constantly exposed to the weather, road salt, etc and it is a prime target for theft(unless you were to drill through the ends of the bolts and install padlocks).
Ary