Well,
An update. After tweeking with the detail settings, I can now have the cars go by me without the jagged graphics glitch. So far, i still must use one of the drivers to not have it crash to desktop in 08-09 season, but i can deal with it.
I can see why Plainsmen likes this over Gp4, it does have that twitchy feel of a F1 car. The sim is more in depth that GP4, so its learning curve will be stiff. I need alot of practice... Im using Interlagos as my test bed, as its a more flowing course than the others to me.
I still highly recommend this Full Updated Sim. Very well done and supported.
ISI were the originally developers; EA was just the publisher. ISI is why F1C was (and is) so great. That "twitchy F1 feel" is awesome, ain't it?

But I have the original with the Ralph Hummerich updates for '03 - '04. Can't say what this newer "modder" has done to it.
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Playing the games only God could've made: Ghost Recon (classic with 300 expansions, total conversions, and mods); Rainbow Six (original); Rogue Spear (Urban Ops and Black Thorn); NASCAR Racing 2003 Season; Grand Prix Legends....
And the best stuff from mere mortals: rFactor, GTR2, GTR Evolution, IL2 1946, Lock-On: Modern Air Combat, Over Flanders Fields: Beyond Heaven & Hell, and DCS:Black Shark