i can understand why dolphin wont run on 32 bit operating system but project 64 should work.....
in vista, go to where project 64 is installed and look for the main executable (project64.exe)
right click on it ---> go to the compatibility tab ---> tick the box for "run this program in compatibility mode for: " and make sure that the drop down box says "windows xp (service pack 2)"
then try and run project 64 again....