Hello Tevfik,
As far as I know, you can only have one enrollment code per device-type, per self service portal. If you run the EUSPP setup file again, you can create a second SSP that has it's own distinct file path (The root of the file path will remain the same, but the suffix will be unique). For example, one site can be http://afariahost/ExecSSP and another can be http://afariahost/salesSSP.
~Timothy