This is a simple AI of a companion, who follows
you quite accurately though a level.
No nodes required to set.
(script is not quite clean, but rather fast written)

http://www.wasteland.at/companion.zip

It works on any bsp-level for A6.6, (dont use Models for
bridges or so)

Just use the buildproperties:
//build-values WED: 25,64,0 for narrow and fat
this is required for the movementcode to work correctly

you should also place the player into the level
(action: the_player)