any receiver that is cabable of reading the "irdeto 2" encrytpion will do.
many generics receivers do this.
sometime you may have to upload newer "unofficial" software to your receiver to enable it to read the cards - like many installers do with skth sky cards...skys encryption is not available on any generic receivers, unless you "patch" them with special software.
you can aslo buy a special card reader that fits into a CAM slot on generic receivers.
many people who offer showtime tend to favour the darkboxes...