my main priorities would be the doors, id probably leave the petrol flap as the cap has a key anyway and as for the boot its opened like once a week so id probably fit the boot kit later if at all, its zero central locking thats why it annoys me so much and im basically just after fitting a central locking kit with a key fob
its a really simple and easy job then mate,
find a screw hole anywhere beneath the door pin, there might be two the correct distance apart to screw into both holes on the solenoid but if theres only one then use the ladder shaped part whcih comes with the kit to add the extra hole (youl know what I mean when you see it.
Now if you feel up inside the door towards the door pin you should find that the door pin attached to a plastic piece, that plastic piece has an extra hole in it, this hole is where you need to put your rod that also comes with the kit, work out how long it needs to be and cut it (I just used two pairs of pliers to bend it until it snapped, easy that way) it has to be long enough to bend the end to as far over a right angle as you can get away with so its less likely to pop out of the hole during operation, now you need to stick that rod through the hole in the plastic thing. Before you do that, pop off the part at the end of the solenoid and put it on the rod first so its at the end with the notch on, (hopefully that will make more sense when you see the parts)
When youve got the rod nicely through the hole, you need to pop that part back on the solenoid and with the door unlocked have the solenoid in the extended position and secure it to the door. the solenoid with the most wires coming out of it is the master, the rclick kit comes with two of these, the only difference is that master solenoids unlock everything else if you use the key on it as well as when you use the fob, so just use them in both doors if you want although it doesn't matter that much.
To fit the loom take of your dash under trays and if you feel up beside the fuse box, a little above the metal thing that you can screw one side of the under tray to, you should be able to find the hole to the world outside which will take you to the rubber grommet on the outside of the car, you may need to dig for it but its there

The passenger one is in the same place on the other side, you can either make a hole in the grommets in both the car and the door to put the wires though or REALLY you should acquire the rubber boots that the wires can go through , VW still stock them.
the loom is simple, it all plugs together and is colour coordinated. then it plugs into your little black box that you can hide wherever you like.
if your cars a 90 spec, theres an earth claw above the fuse box for yoru earth and the live can go on the far right hand side of the back of the fuse box, its got thick red wires going into it and there should be spare spades there.
im not 100% sure about pre 90 but i think theres a collection of live spades on one side and ignition lives on the other and I cant remember about earth, it does go tho, from what I remember, its easier.
you should be set up then. theres an extra plug for other things too with that kit, theres the window wind up thing and boot pop that both require buying extra bits and then theres the two brown wires that you can splice onto some wires going from your indicator stalk if you want the indicators to flash when you lock/unlock the car/ use the car find feature. its simple to do, in fact all of its pretty simple cause I managed it and im crap at this stuff :p
Thats probably more info then you needed and probably made no sense, its pretty easy to work it out for yourself anyway, but I just felt like a typeafon :p