Create a new TSYS object for Palmetto 800, just like you did for Horry Co. TRS, and put the control (red) and alternate control (blue) frequencies in as control channels. You'll probably want Site 38 Conway and SIte 61 NMB. The program the talkgroups for Troop 5, which covers Horry Co (Ch. 70)., Georgtetown/Williamsburg (Ch. 68), Darlington/Marlboro (Ch. 65), Florence (Ch. 67) Cos. Associate those with a scan list, and scan it. That should get you going. Most folks will program all of the Troop 5 tlakgroups, along with other state agency talkgroups for your area. But if you're only interested in SCHP for Horry Co., just program Ch. 70 (29328).