Hello, I purchased a 14" IBook G4 a couple of months before they were upgraded and I love it very much, even though the new IBook comes with a little more. But, as I'm still new to Macs, I have a few questions about my IBook. 1. can you upgrade the hard drive if, down the road, you need more space? -and- 2. can you get the SMS installed on your computer if it didn't come with one? thank you for your help.