Hi i also have the same processor and garphics card plz help me how to install the lion I tried by booting in verbos mode and it hangs in (ntfs volume name version 3.1).my specificatio of laptop are-i7 2630 ,graphics optimus enabled nvidia gt540 m and intel hd 3000 and my Laptop is intel r sandy bridge mobile graphics accelerated integrated vga bios. Always it says to restart after booting some time in normal boot after apple logo appear.