well, to try and answer all you questions...
yes its registered (in Victoria), it used to be my daily driver. but it was costing way too much on the fuel! (i do 120km per day to work and back) so i now have an MY09 Subaru liberty, which handles the daily chors very well.
the wheels are great (p1 buddy club) i think at the time when i got the car they were one of the lightest rims available, from memory they weigh 7kg without the tyres.
the four wheel drive system is what makes the GTR so awesome, its really worth the extra weight. it was so far ahead of it time, the way it can transfer the power from the front to the back and vice vercer is simply amazing, you can stand on the throttle round the bends and it just pulls you around with a hint of oversteer. i love it!
feel free to ask anymore questions,
cheers,
matty.