I haven't completed my upgrade on my VS-II but am in the process of doing so. Just waiting on some bits in the mail to finnish the job. There's no difference in my doing a VT brake upgrade from your car to mine, so you're lucky there. First thing's first, if you're gonna do the brake upgrade you'll definately need a budget! I initially thought whack on a set of VT/VX calipers and that's it! truth is it's not! You're gonna need bigger rotors and pads to suit, conversion hoses and either a modded VT+ booster with master or a VS booster with a VT+ master unit to get the best out of it all. The VT/VX brake upgrade is however quite easy to do. First of all after you've got all the gear you need, you'll need to jack the car up with the front wheels removed. Then you'll have to take off the rotors. Once this is done, you can see how the calipers fit on the hubs and you'll notice that you'll have to get in there with a grinder to remove the excess dust cover. Gotta cut that down to size to clear the new calipers. Once this is done you'll have to either use either VT+ rotors with the VS centre hole "DB040B" or use standard VT+ rotors "DB040" with the egg-ring spacers to pack up the slack from the rotor to the wheel hub. This slack is only 1.7mm but is enough to cause damage if it's not dealt with. Once that's done you'll find the original brake hoses will be a little too short, so you'll have to get new ones. Race brakes sydney is good for this, and I got a set of s-steel braided ones for $150. Now for the next challenge you'll find out that your braking system probably won't be up to spec as far as the master unit goes. No point trying to change the master from the VR with one from a VT+ as i've been told they won't fit, however if you get a VS booster that will be a direct fit. There are some other options as far as it goes also. You could pay the $500 for a VT+ booster and master that's already converted for your VR or buy a good secondhand VS booster and VT/VX master cylinder. Once you've got that all sorted you've just gotta bleed the system like mad. The cost of it all?? You can get basic conversion kits from ebay for around the $700 mark with solid rotors and standard pads but will still have to deal with the master/booster seperately. A secondhand booster/master unit won't cost too much though. Maybe $100 at the most if you're smart.
The cost for me to get the conversion parts is as follows:
$75 - VX master/booster "just wanted the master"
$100 - VX Calipers
$180 - Drilled and slotted rotors with performance brake pads
$50 - Egg ring spacers
$192 - Stainless Steel braided hoses with adaptor for VS booster to VT+ master cylinder
$40 - PBR caliper seal kit "recommended when using secondhand calipers"
$40 - Brake fluid and caliper paint
Total Cost = $677
Don't know if the brake upgrade is really worth that sort of money but there it is! Won't know if it was really worth it until the conversion is finnished!
Hope this helps ya' champ!
Cheers!