One of my favorite programs for the NR-70 is YiShow Explorer. This program serves as a launcher, file manager, doc reader, and image viewer, and is pretty inexpensive. It supports the NR-70 full-screen, with the ability to hide the virtual graffiti. You can get YiShow here.

One of the nice things about YiShow is the ability to set a background image. There are some requirements for the image to work, however. In version 4.5 or higher, it must be a .bmp, .jpg, or .pgp, with dimensions of 320x480. In earlier versions, you are limited to 256-color bitmaps.

To set images as backgrounds, copy them to your memory stick. Navigate to the directory in YiShow. Tap and hold on the file name. In the menu that comes up, choose BackImage.

Here are some backgrounds for YiShow. The images shown are JPEGs, to save on bandwidth. To download the actual background bitmap, click the "Download" link.

Please choose a group of background images to view:
Scenic | Sony Style | Solid Colors | Misc. Images | Will's Pics