payment options based on category - possible?

[jonias]

In the event a customer orders both a subscription and a regular product, the entire order would be processed manually.

[jonias]

Can someone please point me in the right direction? Maybe just give me a hint as to which files I should edit or maybe some syntax to detect if a product is of a certain category ID? I'm pushing a deadline and would really appreciate any help I could get. Thanks.

[Ajeh]

You can control whether or not a Payment module is displayed based on the:
$this->enabled

being true or false ...

So, you can set a condition for that based on what is in the cart ...

One method is to test if any of the Products in the cart use the master_categories_id that is for one set or the other set of Products ...

I believe if you do a search on:
$this->enabled

you should find quite a few modules that give examples of various things that can be done to show or not show modules ...