Replying to Macbook pro help

    hey, so today all of a sudden i went to turn on my unibody mbp, and it started up at first with the regular white screen with grey apple, then went to the blue screen right before everything is up, but then it went to a second blue screen with the spinning pinwheel thing like in the initial startup and would just go back and forth between the two bluescreens.

    i have tried everything i could off of the apple website short of using a osx 10.5 startup disc, and linking up to another mac to start it up. because i do not have my osx10.5 disc with me(i am at school 4 hours away from where my disc is), and i do not have a firewire 800 to firewire 400 cable either.

     i am obviously going to call apple tech support when it is open, along with taking it into an authorized reseller if tech support fails, i just want to find out if anyone else has had this problem and found a way to solve it.

thanks in advance, and ++k for any help!