I wouldn't mind taking pictures for you, but I cannot do that because I don't have a digital camera. It's very straight forward though.
(the following instructions are for a 95 camry V6, not sure how it will change for other models)
There are four bolts that need to be removed at each corner of the "dash" under the steering column. Then remove the coin holder by pressing the sides in at the bottom. Removing the screws in there will reveal another screw, take that off, the "dash" should fall away, and you now have your ignition wires exposed. They should all be in a cluster with some kind of rubber wrapping keeping them together, I cut this off to give me access to the wires. I also removed the covering off the steering column so I could see which wires I lead from the ignition, but you might not have to.
The wiring diagram can be found here (bulldogsecurity.com):
http://bulldogsecurity.com/New%20Wir...oyotindex.htm.
I tested all the wires using a light tester. The tach wire is located behind the drivers side strut for the V6 and behind the passenger strut for the "four banger"
Then it's just a matter of taping into the wires. I just 18 guage "tap-in connectors" from radio shack, but I suggest using 16 gauge (or 14, whatever the wires are there). It was really too snug and tight with 18.