HELP!!! COMPUTER CRASH!!! :(

[Chaos in 1983!]

Dudes....I need some help!....my computer crashed and I have no fucking idea what to do...since I know there are a few computer geeks around JW(myself included) I'm asking for help here...

Everytime I start the computer...WinXP starts to load...after the loading screen appears...the blue scree of death comes up and gives me this message ..."UNMOUNTABLE_BOOT_DRIVE"...along with a bunch of crap....and then nothing happens....

I tried accessing it from DOS with a boot disk...I write C: and it says access my D: drive inseat of the C:...I disconnected the secondary HD...and when I type C: it says Invalid Drive....

PLEASE...someone help me...I need to get the info out of the HD...I have some ''very'' important stuff in there...along with my music and video collections....fuck I'm so pissed :x

ANY ideas are more than appreciated...