I own the CAA memory maps1:500000 and from what I have been told you cannot export this map to use on a GPS
You can export the Memory-Map maps to a Pocket PC with GPS. Any Windows Mobile (2003, 5 or 6) based system phone or PDA will support Memory-Map. I have my 1:25,000 OS maps on a Mio P550 for walking, works well but the acquisition of sats at startup is a tad slow. Screen shows the CAA 1:250,000 7miles x 10 miles at a readable resolution.