IPhone help? Anyone know anything about iPhone

I have an iPhone 3gs that I have had for about 4 years or so. About a year and a half ago someone went and changed my passcode on the phone and ended up locking my phone completely, it says that I can try to unlock the phone in like 2 billion hours. I have so many things on the phone, and really would like to get into it. The phone does not have the hold button on top, and I tried to officially reset the phone before and it hasn't worked yet. When I go onto iTunes and try to restore the phone, it says that I have to unlock the phone. So can someone or everyone please help me figure this out. Or give me a websight or something. In detail.

This link down below should help you, if it doesn't try going on YouTube for a tutorial:
http://support.apple.com/.../kb/ht1212

The jailbreak you used wasn't the right one… Connect your phone to I tunes. Do the following… Switch it off then open iTunes on your computer plug the usb cable to the computer but not to the phone not yet. Then press and hold the home button on your phone for five seconds. Now while pressing connect the usb cable to it. Stay still until your phone starts in recovery mode where you should see the iTunes logo on your phone screen now leave the home button. Your computer iTunes should recognize the phone now and prompt for recivery… Grant it and then it will prompt to download the software online if no back was previously made… Grant it… It will take a long time considering the size of the software… Once done it will install the software on your phone follow normal steps on phone and done… Bear in mind your data will be lost in this process but you will surely unlock your phone