Ensure you have the latest software for your Infinity programmer, and then start up the software, insert your card, chip face down.
If you have a T-Rex supermodule 4.6, you need the latest Predasaur file.
If you have the earlier twin cam version you need the latest Predator file.
You can find links to these files in the Big Links list:
http://www.satellites.co.uk/satellite/links-section-formerly-nobblys-big-links/
If you have a Fun Card 7 then choose DragonloaderCard (AVR), leave the built in loader, and click on the folder icon next to Ext EEprom, and navigate to the required Predasaur/Predator .dra file.
Choose option 2, reverse span, and click write.
If you have a PIC F84a loader card, choose DragonloaderCard (PIC), leave the built in loader, and click on the folder icon next to Ext EEprom, and navigate to the required Predasaur/Predator .dra file.
Once your card is loaded, follow these rules otherwise you could damage your cam:
Tune your receiver to a FTA channel.
Turn off your receiver.
Insert your programmed loader card into your Cam, chip face up, and if the cam isn't already, insert it in to your receiver.
Turn on your receiver.
Navigate to the Cams menu and choose yes load cam.
Wait until it has finished loading, a message appears telling you the cam is loaded and to remove the loader card.
Remove the loader card, and restart your receiver.
Your cam should now be updated.
If you experience any problems please post back.