If you’re reading this to figure out how to do the hard drive upgrade on a MacBook Pro that came with Lion installed, I’d recommend either reading all the way through before starting since it will save you some time, or skip to the bottom as it will save you time. If you follow along, you’ll end up doing the same stuff I did which will make your upgrade take longer than it should.
Last weekend (10/2/2011) I picked up a brand new 13″ MacBook Pro (Dual-Core Core i7) from the Apple store. I also picked up 8GB of RAM and an OCZ Agility 3 120GB SSD to upgrade it with.
Both of these upgrades are within allowable modifications for the MacBook Pro without compromising your warranty. Also, for the most part, they are pretty easy upgrades, especially the RAM upgrade. I did, however run into some issues with the HDD –> SSD upgrade which is why I am writing this.