Prothane is a reputable brand. And it looks like a complete kit to me but i dont have a zx. And no its not just a normal grease its a grease that is made for urethane bushings. its really thick and sticky.
http://cgi.ebay.com/ebaymotors/_Car-Truck-Parts-Accessories__Polyurethane-Poly-Bushing-Chassis-Grease-14-oz-Tube_W0QQitemZ120368618934QQadiZ2865QQadnZCarQ20Q26Q20TruckQ20PartsQ20Q26Q20AccessoriesQQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item120368618934&_trksid=p4506.c0.m245&_trkparms=72%3A543|65%3A12|39%3A1|240%3A1318
Thats a pretty good deal. You can get little packets of it at autozone but thats much cheaper.