I'm afraid I'm going to get lynched for this one - but please bear with me. I in no way wish to belittle Road Hazzard's acheivement as I believe it to be extraordinary (I WOULD say that, wouldn't I)...
I completed my own "perfect game" on 13th September 2002. This game does differ slightly in it's final edit from Road Hazzard's, but I'll give a precis:
100.0% complete in 229 game days.
337/337 race wins, 100% ratio.
48/0/0 licences - all gold.
Oddly my mileage is "significantly" higher, at just over 10000 miles, but I believe this to be a combination of a few pre-qualifying stints, a few extra laps in 2 hr enduro racing (I hold a few 2h distance records at Racing-Line) and version inconsistancies.
NTSC converted to PAL gamesave, for European (ie British) drivers who want to drive in mph not km/h.
After I finished, I went through the garage with mk's editor and rearranged it, so that the slowest basic road car (IMO the Mini Cooper) was first, through to the quickest basic road car (TS020), then slowest basic race car (Lupo Cup) through to quickest basic race car (P001). All cars are represented at least once.
I inserted the hidden, but PAL-driveable, Nissan R34 Skyline Mspec Nur as well. There was no point in adding the Stratos twins, 996 911 and Diablo as I cannot use them. I seem to recall adding the 10 million credits from GT: Concept as well (for non-PAL users, if you finish GT: Concept you can add 10 million credits to any GT3 game save - only ONCE per GT3 save though).
I've attempted to get GAME (UK store chain) to sell the file, but they seem to be uninterested - despite the fact GT3 has at least another 12 months before GT4 hits the shelves, and no "cheat" cards are currently on the market for it. So I wish Road Hazzard the best luck on getting through to PD.