Manf. of add-on remote alarm?

Anyone know who makes the Guardian Model 911-800 add-on remote alarm system. I bought it through JC Whitney, but they could not help . They said it was made in Taiwan. Still having problems with hooking into Keyless remote, that's why I hoped I could get better instructions.john

 Big Dog; The diagrams that came with the add-on unit aren't very clear. They give four different ways to attach dook lock/unlock wires, some requiring I cut wires etc. This is where I got confused. I tried the hook ups you sent me yesterday with no luck. I'll  try the web page you sent, Thanks.  I've installed alarms before but never had this problem. I see on some units they need to have a learning code for proper operation. Do you think that could be a problem with this unit? john