I have question, if I installed wwp_vista_win7_fix_v1.5.part1.rar and
wwp_vista_win7_fix_v1.5.part2.rar, can i install patch and update for the game?

judging by the program's behaviour you first need to have WWP installed.

Also: http://forum.team17.co.uk/showthread.php?t=57848