I installed Leopard this morning & everything was going great.

I have intel imac 2ghz, I've been using photo booth & it was fine but all of a sudden it crashed & on restart its completely destroyed it just wont work (photo booth that is not the whole system), Ive tried setting up a new user account but its the same.

Please could someone tell me how to reinstall using pacifist i've heard its great for re-installing singe app's but I've never used it before.

any help would be much appreciated.

(apologies if this is in the wrong Forum)