current thinking allows for both a limited pre existing images library on the device, and the allowance for other designs to be placed onto the device.
this is because there is a potential for rather complex things to be done with the device, that would not be easily doable from the local keypad, so being able to upload a pattern/sequence, is almost a necessity.
the methords being debated for this is a flash card/card reader/writer combination, and a USB-like cable scheme

an internal image base is something that i would like to do regardless of uploading capability, but will depend on my ability to coner, persuade some artist/graphics types to help :P