well, As long as the gs code does it before the photo is taken I won't call foul. My main concern with photoshop editing is covering up the ugly parts of your car or making it look a few years newer. Imageshack size with link to full size or you can go straight through your GTP account and use the pics albums provided.
You know what, never mind on the GS code, using it would set a bad example for the competition, even though the color code has no impact on the car, other than appearance.
I use Photobucket, I've had too many issues with imageshack in the past.
The thumbnail to fullsize, is not the issue, but rather the time needed to upload a bunch of images at around 1 MB, for those at 56K, even at 100% efficiency (which will never be attained), it could take upwards of 3-7 min., even Uploading of 3 pics would take longer than it takes to run 5 laps in these slow cars.
Not to mention the time requirement to take a bunch good, action shots. From competing in PM competitions, I know it can take a hour of shooting to get 2 or 3 really good shots, I'm not quite convinced those competing are willing to put that kind of time investment in, specially considering we can't get more than 3 shots in an actually PM competition week to week.
I up for the photo portion, and I'm sure SVX would be up for it (being the host of a PM comp already), but I'm not so sure about the others, and it may turn off future competitors here.
Just food for thought, keep it fun, quick, and simple, and you'll get more interest. My photos were included just for fun and presentation, not everyone is going to do the same, and get enjoyment from it.