Theres a lot of people having troubles getting 100%. Everyone says that they have finished all races, but something must be missing. I never had any problems with that, so I don't think I'll be able to help you.
Back from the depths of hell... Not really, just school.
Anyways, you can pretty much ignore anything on my bio/profile, as it's all extremely outdated. About 3 years to be precise. Same goes for the name, although I'm still enjoying Ratchet & Clank ;)