hey all, had a couple of questions about the scangauge II (and original scangauge i suppose)

1. the scangauge II says that it can store up to 10 programmable commands... what does that mean? what can i tell my engine/how do i do it?

2. when i first bought it i remember talk about being able to hook it up to a home computer eventually.. anyone heard anything about this? Tone?