Hi there, i wonder if one of you guys can help me out. I installed a new hard drive 250gb scorpion into my 2gb ram 1.8ghz macbook and installed my tiger original hard ware, everything seemed to go fine but now my macbook won't start up at all. I can eventually get it to turn on again using my install disc but it won't start up properly by itself. Any help will be much apprieciated as i'm new to macs and want to use this as my main computer rather than my pc. Thanks in advance to anyone who might help!!!!