@Zeejay,
a Cas programmer works great, well worth the £40/£50 it costs you, but then you'll find that you actually "OWN" the cam! You can load what you like on it, and if it doesn't work, just reprogramme it. Make sure that it is a Magic Module with a Toshiba chip though, I only have experiance of changing a MM to a MR (Matrix ReLoaded) but for me it works ace! And I can flip between the two.So the next thing that comes out I should be covered! The next step for you is a Titanium card.... and they do "What It Say's On The Can" anyway. Have fun messing about anyway and if you get stuck, give a shout out here and everyone will jump in and help out as and when they can.
Cheers,
Dom.