To jailbreak to the most recent iOS Firmware version of your mobile Apple device (iPhone 4, iPhone 3G[S], iPad, iPad 2, iPod Touch) it is not as hard as you may think. Here is the simple “How to” guide.
Start up RedSnow and browse to your firmware. If you made it this far you should see something like this.
Once it is verified it will start crackin’ kernels
Now comes the part that takes some work. You need to go into DFU Mode. Simply follow the on screen directions of holding down the power and home buttons.
If done correctly you will see your Mobile device start really rooting the device. During this process RedSn0w may be closed. Upon finishing your device should restart with Cydia included!