HELP! PASSWORD CRISIS!

Ok, I have just purchased my new MacBook Air days ago and I have forgotten my password and I have accidentally disposed of my operating system installation drive (used instead of the disc as the MacBook Air does not have a built in disc drive). The ultimate answer is to re-purchase the operating system and reload it of course, but that would also require installing an external CD drive and all sorts of things that I do not want to do and that I do not have time for.
So, taking into consideration that I know very little when it comes to command lines and what not (I would recommend cut-and paste, although do explain what is going on) here is the question: Is there any possible way to change the user password independent of the operating system drive? (specifically by going into single-user mode)

No offense to the fellow who linked that article, but this is what you need to do for our newest operating system which is 10.6 (a lot shorter and easier then 10.5!)
Turn of the computer
Hold Command-S and turn on the computer till a bunch of computer programming stuff pops up
Let go of those keys
Press return
TYPE EXACTLY AS SEEN:
mount -uw /
Press the return key
TYPE EXACTLY AS SEEN:
ls /Users
Press the return key, it'll show you a list of available users. Yours will be there you'll need to type it in exactly as you see it in a moment (no spaces)
TYPE EXACTLY AS SEEN:
passwd yourusernamegoeshere
Press return. It'll ask for a new password, and *THE CURSOR WILL NOT MOVE AS YOU TYPE FOR SECURITY REASONS but it is registering what you type*
Enter the new password
Press Return
Enter the new password again
Press Return
TYPE: reboot
Press Return
Once you login it'll ask you what to do with the keychains as it's locked. Create a new one

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