Your best bet is to use the forum search facility with the key words 'digital camera'; there's been a lot of posts on the subject. To get you started and to give you a flavour of whats there, take a look at these topics...
http://www.pprune.org/forums/showthr...digital+camera
http://www.pprune.org/forums/showthr...digital+camera
http://www.pprune.org/forums/showthr...digital+camera
Incidentally, you operating system IS important - if you are using Windows NT you'll have a problem, because NT does not support USB.
Good luck!
FJJP