Payment format - payment advise

Hello,

I have the following problem: we have a company code in CZ. The payment run creates payment advises for every payment. Now we have the requirement that an advise should be printed out only from e.g. 4 items on. In the customizing I changed the note to payee and also developed a function module to reference to the table t042e. But nothing solves the problem. The payment advises are printed for every payment item. I think that this is "hard" coded in the payment format? but how can I find this code? And is it possible to change it?

Thanks for your answers