To unlock, or jailbreak, an iPhone 2G with 2.2 firmware connected to your PC by USB, requires two folders downloaded from the internet and saved to your computer's desktop. Those folders are called PWNAGE2.2.5, 3.9BL, and 4.6BL and can be found with a simple web search. You will also need to download the 2.2.1 firmware from Apple again and save to your desktop. Merge these folders into one folder. Run the PWNAGE2.2.5 program after selecting Expert Mode and your iPhone. The remaining files will be be opened by the program.