Bank transfer module activation if Purchase more than "TOT"

[travelbaba]

Hello everybody,
I'm trying to setup the payments in order to satisfy the following options:


If purchase < 1000 EUR visible only cash on delivery.
If purchase > 1000 EUr visible also Bank tranfer with the message of a pre payment of 30% ( also visible the calculation) and the rest after 30 days Invoice.

Maybe someone has already seted up this option, so could share it.

Thanks

Matthew