Actually I think that the Tom's answer is the correct solution, but here is one that fits almost too easily:
film, as in movies
Centuries have been achieved with my aid.
Cinema, though not old itself, can and does depict many ages. Also 20th Century Fox, as suggested by LinuxBlanket.
I wear my hair in one very long braid.
Film is wound up on a reel in one long strip
Exploding cars you need? I'll get one made.
Exploding cars are a staple of many action movies.
Please go and stand up in line till you've paid.
People often wait in line for a movie ticket on opening nights for popular titles.
Actors awaiting their turn in the shade.
Actors play in films (duh!).
Can you locate me in this masquerade?
Films are all about roles and masks and creating nonexistent characters.