Worked flawless here on Windows XP SP2 with
iPhnoe 3G before 2.02 Pwned.
First I got rid of BossPrefs to make all hidden icons visible,
then did the upgrade thing in iTunes 8.0.
Quickpwned, got Boss prefs and all needed programs back from Cydia, like openssh ect.
and just deleted the duplicates in the 'stash' folder manually. Working perfect.
Thank you guys, also to 'law' to mention that thing with BossPrefs!