How to configure 5th camera???

[gwr]

I don't have a reply but I do need help  on a problem. I have been using 4 x- 10's with great results
I am trying to add a 5th x-10 but I get overlapping pictures

camera1 unit code 1      All house codes A
camera2 unit code 2
camera 3 unit code 3
camera 4 unit code 4
new camera unit code 5 What unit code should I use for camera 5 to prevent ovrerlapping?
My remote has 8 buttons, and my Sears control bax has 16.    PLease help!

[Brian H]

Cameras are in groups of 4. House Code and 1-4;5-8;9-12 and 13-16. An On to any unit in the group turns off the other 3. Since A5 is not in the same group A1-A4. You will have to send an off to the first A1-A4 group before turning on A5. Then to use A1-A4 turn off A5.