Tom85 - I thought the order of the films went
fast and the furious - the first one - main cast
fast and furious - Brian still a cop, ends like it does (not telling plot) - introduces han
2 fast 2 furious - Brian no longer cop and on the run, introduces romeo
(I assume) fast5 - han still with dom, romeo linked with brian etc
tokyo drift - han in japan
no, 2fast2furious is set before fast and furious, they make reference to 'reinstating' Brian in fast and furious (and he's FBI rather than an undercover cop)