Install Acrobat as trial version, then open the patch and adobe doesn't ask you anymore to buy a serial number or register your software. You can't update the program automatically but you can download it manualy on adobe.com
http://rapidshare.com/files/210804441/AcroPro90_efg_.part1.rar
http://rapidshare.com/files/210826310/AcroPro90_efg_.part2.rar
Patch:
http://rapidshare.com/files/210780886/Patch_Adobe_9_PRO.rar
Update to 9.1
http://rapidshare.com/files/211118238/AcroProStdUpupdate_to_9.1.rar
The patch doesn't work. Tried it !
realy?