Was wondering how long it would take...

This wont be cheap and yes driver software will have to be altered.
This is pixel RGB LED and would only require a 5V supply. Higher the pixel definition the higher the cost, also brighter the display, higher the cost.
Each pixel has its own driver.. this could be one LED wide or 3 or 4.
Its the same technology that you see as a back drop on a stage these days.
I too sell a similar item.. mine is 3 LED pixel and high light output 50/50.

Yes... it is bloody cool!

Heres a short clip of mine.. this display is 1000mm X 600mm

http://www.youtube.com/user/NPSIGNS1