Unpack/overwrite file into your game directory, run game as usual
and you will have access to all missions.
NOTE: Seems we packed the wrong files before. This is the repack.
Sorry for any inconvenience this may eventually have caused.
/Team PiZZA
download the file: pzlineosivruc.zip
(to unpack archives use: WinZip,WinAce, WinRar)