[Velocd]

Since it is just an array, if that already exists all you have to do is go up the numbers until you reach one that does not exist in the array, and place below it:

$cpnav[x]="{_secondaltcolor}";

Where 'x' signify's the number that is next in line. Then in the usercpnav-template, make sure you change the value said in the instructions to this value.

You don't want to avoid this step unless you don't care about cosmetics.