Sorry, noob question...

but does anyone know where i can find images for the N3 so set as a custom background as well as how to store them into the N3. thanks... much appreciated...

The first page of the forums has a "Custom Background" Thread. Search around in there and it will tell you how to upload them to your N3. It is easy. Image size 2048 x 1536 is what works for the N1-N3's. Hope this helps.