How to process XF86 keys (like XF86Calculator) on a Mac?

The keyboard I use when working with the Mac book is a
Cherry KC1000 (PC keyboard) and comes with additional keyboard shortcuts. I have XF86Calculator, XF86HomePage, XF86Mail and XF86Standby,
XF86Standby behaves like the on-off key on the internal keyboard, while the others seem to not work at all.

Is it somehow possible to use these keys on the Mac (ie handle them if they were F16-F19, similar to Print screen, Scroll Lock and pause just behaving as if they were F13-F15)?

Additionally the Menu Key is also "dead" – same question: Can I use this key on a Mac?