I have exactly the same problemHi, first of all thanks for the awesome mod, I remember playing it back in the day and decided to take the opportunity and relive the experience. Sadly the installer is not working for me. Maybe I can ask for some help.
I've downloaded the complete package form the mediafile links, I've checked all files with the additional app and all is OK. Running Windows 7 64bit, when I click on the PnGv3.2_installer.exe it doesn't do anything it just stalls (tried running as administrator as well). It starts three identical processes called "PnGv3.2_installer.exe *32" and I can't even end the process or the process tree.
... and that's as far as it goes