Ciao Sasha,
At the moment, there is no Pwnage Tool available for the iPhone FW 2.0.2, but that firmware can still be jailbroken by using QuickPwn. The process is as follows:
-Update your iPhone to 2.0.2. This WILL erase any jailbroken apps you currently have.
-Download and run the QuickPwn tool for Windows, see:
blog.iphone-dev.org | My little Pwnie - QuickPwn
You will now be running the latest firmware and have Cydia/Installer and you'll be able to re-download and run jailbroken apps.
Once you pwn your phone with any method, you can always restore your iPhone in iTunes and it will be back to normal.
Hope this helps