The e-Reader cards have finally been dumped and I've been playing around with the data for the past few weeks in making custom courses and challengers (ghosts).
The challenge cards basically just contain the ghost data, and once the data has ben trasnfered to F-ZERO: Legend of Falcon, you can watch a replay of the ghost and even save it. Thanks to caitsith's tools, it is possible to use any ghost. Basically, if you have the ablity to upload the GBA save with the ghost on (can be JP, US or EU version) that you want to turn into a card, then post it here.
Below you can download the dot codes for a Custom Challenge Card (for the Japan Card Reader e+), which is RichardTaro's ghost on "Championship". There is also a YouTube video as well. I'll try and get a guide togther on setting the e-Reader emulator and on how to make them yourself. You can also print them out, using the nedc_print tool (www.caitsith2.net/ereader/tools/nedc_print.rar). You will need a good printer however that supports 300, 600 or 1200 DPI and must be on Glossy Photo Paper.