What can I store on the PCMCIA cards I can use with my unit? If I buy a card which contains the latest software, can I then also use it for presets without erasing the software on the card?
This is unfortunately not possible. The PCMCIA cards can either contain presets OR software for the unit, not both at the same time.
It would of course be possible to buy a PCMCIA card from us with the latest software, update your unit, format the card and then use the card for preset storage. You'd obviously lose the software on the card in this case, and you'd have to send it back to us to have software reloaded onto it (which would then mean formatting it again and losing any presets stored on it), in case you'd need to update the software on a 2nd unit later.