Re Starter Kill - I do not know how to solder, I've got heat shrink and crimps. I've also got some posi connectors like you'd use for audio wiring (next project), that I can steal and use for this if you feel that would hold up better. Both wires go in and it screws them together and holds them.
Sorry, can't help much here. I always solder everything. I really haven't used or tested any other methods. As a side note, during a recent install on a RAM 2500, I had to repair a butt crimp connector in the door sill harness from a stereo upgrade because I moved it slightly to gain access to a door pin wire and it just separated. Here is a link to a video from Bulldog security showing R/S install instructions. In the video, starting at 4:44 and going through 6:50, it details how to make wire connections without soldering. http://www.bulldogsecurity.com/bdnew/remoteStartervideo500.html I would suggest using a high quality electrical tape like Scotch Super 33+. I have found that other brands will dry out and unravel in a few years, causing big problems.
Re Hood Pin - I do not mind using the hood pin - can you explain in more detail how and where it needs to be mounted. I'm just not sure how to get it setup correctly, and don't want to drill multiple holes. In addition, how do I get the wire from inside the vehicle to under the hood without additional drilling. Everything looks pretty well sealed and wrapped under my column.
With a tilt hood pin, I check for clearance when closed on the vehicles driver side hood hinge. There are usually two bolts securing the hood to the hinge. I remove one bolt and reinstall it with the tilt switch. The switch can be bent down to adjust when it actuates and kills the R/S'ed engine. No holes to drill, no extra fasteners to buy and they don't rust and seize up like regular hood pins. The only down side is that for proper operation, they must be adjust so the the hood is opened half way to trigger which isn't ideal for alarm systems. Here is another photo of this :
The hood pin that came in the kit is spring loaded and triggers when fully extended. If your vehicle had a corner where there were bolts holding a fender on one side and another on the radiator side, you could use those two bolt to secure a piece of stainless steel between and mount the hood pin through that. The only issue would be the hood contact area and pin adjustment.
Getting a wire through the firewall can be difficult on some cars. Some cars have an unused grommet in the firewall and the wire(s) can be pushed through them. Some cars have a big grommet with a large wire harness. If there is some space on the side of the wire harness and the hole, you can use a coat hanger to punch through the rubber grommet material and pass your wire(s) through. Just be careful that you don't damage any wires on the other side. Even the grommet that is used to pass the hood release cable through the firewall is acceptable. Use a flashlight and check the drivers side firewall from the engine side for any possible grommet locations, then find them on the inside. Every car is different. Your system has a siren that should be mounted in the engine compartment and the Brown wire ( along with the Hood Pin wire ) needs to be run.
Re Tach Learn - I don't guess I have a choice if I want reliable engine starts like you mentioned.. How would I go about this procedure? Would this be after everything else is wired up and completed?
The brief install guide included with the 5806V has the Tach Learn process listed. Here it is in case you can't find it :
Soldering is fun!