Using byte arrays as keys (RSA)

I am trying to use the RSA-512 functions from Delphi (Non ActiveX DLL).

I receive the N key (64 bytes) and the E key (4 bytes) in binary form from a connected device.

I want to import these keys into the rsa object, but don't quite know how to do it.

Id be grateful if someone could point me in the right direction !