There is no way to convert a Euro CAM to a FreeCAM. The hardware is different. However, your Sammy can be patched so that its internal CAM acts as a universal (multi-encryption) CAM, suitable for using with 6-in-1 funcards and suchlike.
I'm way behind on the Sammy these days. Last time I looked into this (a few months ago) there was a patch which when applied to the receiver's firmware allowed a standard Irdeto Euro CAM to function as a multi-encryption CAM. As an alternative, there was also an emulator for the PC which allowed multi-encryption reception over a Season using the receiver's embedded CAM (not the CI slot). Anyone else out there have better/more up-tro-date info than this?