5 - 30 minutes
I had a hard drive with 160 GB of space. I do a lot of graphic art and multimedia work and my disk space was full and it began a kernel panic that would cut my machine off in the middle of projects. Grrrr!
The repair was straight forward and simple :)
Make sure to download a hard drive cloning program like SuperDuper!
Also, if you disconnect your battery connector from your logic board make sure to plug it back in. I forgot and powered up! Luckily the connector went back into place when I closed it back up...whew!!