There should be some brackets for the grille to be placed in. The brackets are on the side of the whole headlight. When you put the grille in the position it is supposed to be in, it should click right into place. I'll try and find a photo to show you what I'm talking about.
My boot (well the side of the boot) used to always fill up with water. There would be at least 5ltrs of water!! I wasn't sure as to how it was getting in there, but I found out that there is a plug Nissan had put at the bottom to drain the water out. I just ripped it out and the problem is sort of solved.
Is the water actually in your boot or in the sides where the jack is?
To keep water out of your taillights, just reseal them up.
I would go the no kit and riding on rims. Just make sure they're not some shitty 7" wide wheels.
Not only does not having a kit look better (at times), it'll be easier for you as a daily. I just like cars which look nice and simple. Having a kit will give you attention from cops and I'm sure no one wants attention from cops.
I wouldn't go for a GTR if I was on a budget like you to be honest. The reasons have already been said. I'd go for the S15 or the 34 depending on whether it's going to be daily car or a weekend/fun car.
S15 for the weekend/fun car and 34 for daily.
If you've taken the unit out, try pushing hard on the brakes to see if it locks up. If not then chances are, it's not the abs unit. If it does lock up, reinstall it then brake hard again. See what happens.
Not sure if I've seen anyone take the badge on the bonnet off, but to take the others off, you would normally use a heat gun or a hair drier to melt the glue and then use some fishing wire to 'cut' the badge out (if you know what I mean).
Doesn't sound like anything's wrong with your gauge or your car mate.
Aftermarket gauges aren't any use if you're only street driving is it? Unless your old one's stuffed.
There are quite a few places that would sell four door bodykits. I think a few traders on here and ns.com have the vertex and bnsports kits forsale. You can get get coupe front bars/lips. It'll fit on your four door. It's just the sides and rear you have to worry about.
I'm not too sure N1GTR. The way my kit was installed is the same as what I put in that pic.
I think what you have there skybarge is the cables if you want to power your ballast from the battery (as in straight from the battery). Those plugs were provided with my kit, but it wasn't needed.