Oh interesting, so someone already did the tuning with these drivers and amp for your car (hopefully the same amp as you will need the same output level he used). You just have to install them in the same location. It also assumes your head position woulds be in the same location. After you get things installed you can start playing with the tune a bit mics are 50-100 $ and the software is free, just requires a windows laptop.
With regards to TA, you might have to set that a bit differently if the location of the subwoofer is different than his. Because the subwoofer is the furthest away from you, the delay for the subwoofer is Zero. Which for you is important since the DSP is only 4 channels for the front stage. Next you delay the drivers that are closer to your head with respect to the subwoofer.
Here is an easier calculator for you to use.
You need to make sure the power wire you ran for the subwoofer has enough capacity for the addition amp. I would recommend a fused distribution block. Even this cheap one works well enough.
This is a combo power and ground block.
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For the smaller loads like the miniDC, LOC, etc use the in line fuse (5amp or whatever) on top of where ever you install in the distribution block if it doesn't include a fuse with the correct current. For example, say your miniDC has a 5 amp fuse and you run some 12 gauge or 14 gauge wire. The smallest fuse size is 30 amps (from the distro block above) so to properly protect the wire from shorts you need an inline fuse of the appropriate size.
Another option would be to use a distroblock like this for the smaller devices. This option works pretty well since your 4 channel amp has current rating of 15 amps and the LOC and miniDC/DSP is probably around 5 amps. The subwoofer power could just pass through the terminal.
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I think this option 2 is technically the correct way to do it but you could probably get away with option one without burning anything down.
Ok for the remote wire I would take your switched power from the vehicle and run that directly to the miniDC. If the LOC is "on the way" to where ever the miniDC is installed than its Ok to wire it inline with that first. However, you will want every amplifier wired off the miniDC remote out because it has a delay on/off. If the you have some amps turning on and off at different times you can sometimes get a thump. It also makes things easier to wire when you simply daisy chain from miniDC remote out to the Sub Amp and the to 4 ch amp.
