HELP. i screwed up my macbook pro mid 2010

[thesituation]

i installed a 750gb hard drive last night as well as 8gb ram and now my computer doesn't want to boot up, even with the install DVD (original one).

With the new hard drive i get the folder question mark thing. So i put in my install DVD that came with my macbook and it freezes on the apple logo with the spinning wheel stopping. I left it on even for 30 minutes thinking it will eventually boot but it never did.

So i switched my hard drive to my existing one and same thing, freezing during apple logo.

NOTHING SEEMS TO BE WORKING. HELP.

Also, for some reason my bootcamp partition working.

 

[blueroom]

Put the factory RAM back in.

 

[Dangerous Theory]

Don't know if this would help, but it's something I'd try: http://support.apple.com/kb/ht1379

 

[thesituation]

decided to take it to apple store.

i think i installed the ram incorrectly cause i wasn't able to get the bottom one out no matter how much i tired. in fact it went even more inside.