mate, i had the same problem for a while!! its soo simple though (luckily!)
i know it sounds dodgey but just hold the lip of the cover (the lip that goes over the screen) and pull it up. The hazzard button is actually part of the cover itself, it just has a few wires attached to it, nothing dramatic!
the cover that goes over the screen is honestly the easy part! just pull it up an out, it takes litterally seconds! i know that it looks like its attached to everything but its not. have fun!
P.S. i dont meen to add more to your problems but r u sure its the bulbs that need changing coz it might be a loose connection. Sounds weired that all the bulbs have gone in 1! Im talking from experiance coz my display blacked out for a while an i thought it was the bulbs too (hence why i know how to remove the cover!) but it turned out to be a loose connection....sorry matey, i dont know how that one works! got a friend to do it for me......hopefully it is just your bulbs though!
Good luck!
Ed
Ed, October 2006