Just my 2 cents.
Flinx proposal
I like and respect Harald's idea, as it does lean more towards a true team format, but I also echo Rico's sentiment that in past BC's it's usually the best individual drivers stacked up against each other. However there is nothing to stop us implimenting it in time. All I would humbly suggest is that if we do.. Let's do it soon as weeks and months can fly quicker than you think, and some teams are already geared up for the established BC format. If it doesn't happen.. I think it should certainly be considered for BC-6 where this format would be in the mix to disscuss from day one.
The only real objection I'd voice if it's implemented in this competition.. echo's what Iforce said concerning the doubling up of drivers.. That's do-able I guess.. but if a smaller teams simply can't recruit the full 10 and are allowed in. It would mean that in this format some of thier drivers would have to take on 3 or even 4 races, which is a bit of a stretch imho.
checking mods and settings
As far as my thinking takes me (Asuming MK doesn't save the day before September) is that there are 2 choices.
1. We go with the Honour system. Most cheaters are hung out to dry and the word passed, even in our home board casual off-line races. if they are caught in a BC in front of the GT World, it's more or less game over for any future GT career, anywhere in the loop. Plus as Samoht says, all the boards do thier best to pick thier most experienced drivers, so I reckon we'd be fairly safe (he says hopefully). Furthermore like Famine points out, whats to stop all replays being archived for future inspection when an edit program come online, disgrace is disgrace whenever it comes. Also, running the honour system might throw up some interesting GT mode combo's of Stock or lightly modded cars well suited to the specific race.
2. We do as Eggmann suggested. In GT mode races, Specify Power mods and weight reduction Tyres, (Which we can check) and just allow anything up to the maximum on any further mods such as susspension Drive train etc. As far as I can see, thats the only option we have to hand at present to be certain. Short of going down the 10 Arcade race route.