well you will need either a 8 gauge wiring kit, or 4 gauge. Depending on what else you plan to do to your install id go for the 4 gauge (if your planning to make it larger) if not just stick with 8 gauge.
In the kit you\'ll get:
Power cable (run down the left hand side of car, from battery to boot)
RCA\'s (phonocables) run these down the right handside of the car
Remote Wire - run these also down the right hand side of the car
Earth Cable - find a suitable earthing point in the boot for this, try behind the plastic covers that cover the back of the rear lights
As for fuse blocks, the only fuse you will need will be for the battery (of which you should connect onto the power cable, as close to the battery as possible. (that means in the engine bay)
You wont need any splitter blocks or fuseblocks if your only running one amp.
With putting your crossovers in the boot, you will need speaker wire to run from your components, all the way down to your crossovers, and then back up the car to the headunit (or alternatively to the amp if your powering them of an amp as well.
If your running 2 amps in the boot, then its best if you run 4 gauge or 6 gauge cable, you will need a fuse box (that goes from 4/6 gauge and splits into 2 fused 8 gauge wires, also you will need another earth cable, as well as a splitter box (that takes the 2 earths into one (this needn\'t be fused), and then to your earthing point. you will also need to run another set of rcas up the right hand side of the car to the headunit for the 2nd amp.
Anything i\'ve forgotten...???
Adam