need help snow leo freezes at apple logo
So I installed snow leopard on my Dell XPS 210 computer which has an Intel Core 2 6300 @ 1.86GHz and it has an Radeon X1300/X1550 Series video card and it dual boots with windows 7 and i got the dual booting working fine and I installed Snow Leopard ok and though I added the right ketxs and stuff in the customize part . Then when it starts up it shows the grey apple logo with the white background and the little circle is rotating below to show its loading. Then it starts playing sound from the OS I think its the welcome intro but im not sure cause it freezes at the apple logo screen right as it starts playing the music and the circle stops moving. Was there a patch or something else that I didn't check to install or what? Also I use 2 screens for my comouter for when i use Windows but i don't really think that would be causing it to freeze cause it just displays the same thing on both screens. If anyone knows what I need to do to fix this problem please let me know asap and please be specific about what I need to do for im new to this.