"so the 24hour race is actually 24 hours? that sucks! i would deffinately not race it all at once.your eyes would be f^cked up " If you don't do it, you don't finish the game, and have you ever heard of B-Spec mode once? You don't have to make your eyes burn.
Anyway, since your name is Minoltafreak, either you are going to treat your minolta right by not racing it or you're going to race it because you love the car. either way, you have to use that car. If you don't really have one, then create a new account with a different name.
Slim PS2 series 70000 just plain never get hot anyway.
A-spec: How is this choice stupid? Some people just like racing that long. It's their choice, you can't just say it's stupid. It may not be your first choice. But still. Nostupid.
B-Spec: Two weeks? You gotta be kidding me.
Approach A: You start in the morning on a weekend, go to B-Spec, Speed it up 3x, watch TV for a couple minutes, flip back, watch the car go to a pit stop. Speed it back up 3x, watch more TV, repeat. If you keep doing that it will only be a little over eight hours. And of course, you don't have to just watch TV. Play your other system. Eat a snack. Go to the computer.
Approach B: Start at around noon. Mind your own business. Come back at noon tomorrow, and you will probably have gold.
If you're going to do it at all, get a rigidity refresher plan in the tune shop, and when you're done, get the support cage (both in the "Other" section of TRD). If you're going to do it A-Spec, which it sounds like you won't be, Take "Coffee breaks" every hour or so. Refresh your eyes, go outside, read a book, something that will keep your eyes fresh and keep the screen from blurring... If that does happen, "contact a doctor right away..."