As the Dragon Cam is an independent unit once loaded and recognized by the reciver it should work without the card in.
To change keys you go into the conditional access menu and it should tell you the slot Predator 2.25 is loaded into, press enter on this slot and you are given a new screen with smartcard DEBUG and settings, go to debug and press enter next page gives you encryptions Dragon will deal with ie:irduhto, sucka etc: pick encryption you require and enter, choosing irduhto will show CAN+NL and ORF, enter one required can+ will page with key0*00-0*03, enter next page shows keys 01 to03, key 02 shows current key in use for that provider. If change is required press enter on that key will produce page with Irduhto>Can+ NL>02>, and below this a line with ??? , replace these ? marks with the first three Dec numbers and thay will be converted to the Hex format and shown after the 02 on the line above. repeat this process for all eight units of the key the press exit the new key will now be in place and working, that way you do not have to bother with the loader card.
I have put the converter into the same folder that I keep anything to do with dragon in, but as yet have never used it.