silver,
you can only enter the MAIN "pick 3" ONCE.
HOWEVER,
you can enter multiple 'sub' groups if you please.
If you are already entered into the MAIN "Pick 3", aswell as a sub "Pick 3" somewhere else, that is NO PROBLEM.
SImply use the same HANDLE that you used elsewhere, & register for the RX SUB grouping.....
You will then be eligible to enter 3 Groupings of Prizes....
1) Main grouping
2) RX Grouping
3) NON RX grouping...