Hi.
I found the information you need on pages 57,58 of the instruction manual. The memory card on this camera is not under a camera driver, but under a removable disk in USB. I tried the instructions and they worked great.
Concerning batteries. My duracell went down real quick also, so I tried some energizer. I was ok till I tried (about an hour) later to download to the computer. I had problems like you did and the batteries went dead while I was searching drivers.
Page 21 of the owners manual states batteries at the top. I think NI-MH ia a rechargeable battery (NI-CAD is). Maybe a CR-V3 battery lasts longer.