Want 2.00? Wait about two more days!
The US 2.0 will be released in several days... i would wait if i were you. Especially with the warning by sony.... also i wouldnt upgrade the first second either... they may have locked up the US version a lot tighter than the japanese version.... so i would wait for the reports and then choose wisely.... we gotta out smart Sony for homebrew right?
//end monkeymaximus edit
if the instructions are in japanese, then the firmware MAY BE the jap 2.0, which sony tells us to NEVER install into the north-american PSP's so install on your own free will.