I think that the wires that you have left maybe..
a) Antenna
b) Sensitivity wire (attach to ground to make more sensitive)
c) Accessory wire for attaching things like a pager unit.
d) A circuit break loop - normally used with a couple of magnetic contacts that you'd place maybe under your seat that would detect the seat being removed...
Now the $64 question... what colour is which? I'll presume they have coloured tabs on the end of the black wires? Well i'm really sorry to say that i can't help you as mine is an Acumen system.... sorry....
And for what it's worth i scoured the 'net for 'self fit' info for the datatool system but had no joy - hence buying the Acumen off Ebay which came with full fitting info.
Bandit