I've got hostages working (except they wont follow me though doors... grrrr)
This is what I did.
1. placed my hostage_entity (I placed 4 of them /shrug)
2. created a brush and textured it with 'trigger', then ctrl+t while that brush is selected and tied that to func_hostage_rescue.
3. now place info_node(s) along the path you want your hostages to go to get to the func_hostage_rescue. Make sure the info_nodes are above the ground. Make sure that the hostages can see the first info_node from where they are and that each subsequent info_node can see the next one you want your hostages to move to.
4. Compile and run your map, once in-game go to the console and type "nav_generate" and it will create the navigation file the hostages use.
* A few things Ive noticed... Hostages won't duck to get under things.. if it's not tall enough for a hostage to pass under without ducking the hostage just won't do it. I'm also having a hell of a time trying to get my hostages to follow me through doors and I suspect it may not be possible to get them to *
