How To - Install the SIMS 3 Ambitions?

Yeah, look at the title. How to successfully install the Sims 3 Ambitions.
And i hope with others expansions, we can use this how to as well. I have not other expansions, so...

Well, anyway!

Basic Things FIRST!!

1) Install base game first.
    DONE!
2) Install the Sims 3 Expansion
     ---> NOT WORKING?
             what's the error?
             is the voice box telling you things like these:
             The sims game not updated, bla bla, setup is unable to continue
             THEN BOOM! setup closed.

So, here's how its done.
check in the disc (you're using disc for installing, right? if you're downloading, well, look in the download folder) whether you have "Support" folder inside. You have? Open it, and open another folder inside Support folder named 'update', and run the update with ending 001.

You may have two responses: 1) YAY! PROBLEM SOLVED!!
Or,                                         2) Oh no! ANOTHER error

then now, what's the error?
is it something like "the game detected...bla bla bla...something about wrong region"
What is it about region uh? cant we download things from UK, and then another from US?
Nah, its not that problem, guys..

The problem is your computer is not in the right region. Well, dont ask, I also dont understand that..my friend, who is a computer savvy, told me that. And i didnt ask her what she meant, because that'll mean a whole afternoon of telling me what it meant, without me understanding anything.

So, click start and click run and type regedit
then enter, or click ok
then, you entered regedit,
click HKEY_Local machine (or something like that)
and search for Software/Sims/Sims 3
there, you can see SKU
click the SKU, and change the value to 1/2/7

(if you have value 7, try to change to 2. If still not working, change to 1, same for others)

then, install the update, then install the sims 3 Ambitions

while you're installing, there's something like CDC (cyclic reduncancy or whatever the name is), please click IGNORE or RETRY.
If you have Ignore, click ignore. If you dont, well, click retry.

Then, YOU HAVE THE SIMS 3 AMBITIONS in your hard drive.
Enjoy.

Any problems? Well, i dont have my computer savvy friend near me right now, well, you can ask here, if she's around then i'll ask her for you.