iPhone 32gb 3GS

[Lafiro]

Ok, I dont want any of my icons or current apps to disappear!

And as of right now, if I can have my phone work like before but have the ability to do more/install more apps, then why not right!

edit:
I found these websites. One thing is, which program should i use to jailbreake my 3GS?

http://www.iclarified.com/entry/index.php?enid=4447
http://www.iclarified.com/entry/index.php?enid=4417
http://www.iclarified.com/entry/index.php?enid=4399

Very nice website, where I downloaded the profile to apply tethering to my phone as it is now, and also pertains to question #4, because I see different files say semitethered? I dont know anymore this is all confusing!

http://www.benm.at/downloads/

1) And is it a good idea to get my phones iBEC and iBSS?

2) When I do a backup of my phone via iTunes, will my contacts be backed up as well?

3) I will assume that I can go ahead and at any time restore my iPhone to OS 3.0 incase anything happens?(the link to the OS 3.0 is in one of the links above)

4) I would assume that I can stil tether my 3.0 phone once it has been jailbroken?

5)Thanks again!