Backing up for a new internal hard-drive

[dscuber9000]

I have a 13" Macbook Pro with only 160GB of internal hard-drive space. I have an external hard-drive that backs everything up, but before I work on getting a better hard-drive for inside my MacBook Pro, I want to make sure of a couple things:

1. When I start up my MacBook Pro after the "procedure" it will put everything back to exactly how it is, right? Like, to the point where it doesn't seem like there is a new hard-drive in it?

2. Will my iTunes account remain the exact same? I don't lose all of my music, do I?

3. About how long will it take to reinstall everything?

 

[techound1]

1. backup your hard drive using time machine
2. install new, bigger HD in MBP
3. install SL on new HD
4. when you get to the point in the installation where it asks for a TM backup, tell it where it is
5. (provided you selected the proper options) when it finishes the install, you will have most of your settings, all of your data (including your itunes library if you don't have it in a custom location), and all of your applications.

 

[dscuber9000]

Alright, thanks. I'm just a little worried.