   PhysX won't install-error 1500
  Hi everyone!I'm developing a setup and deployment project for our game using Visual Studio 2005 and I stumbled upon a problem.My setup and deployment project has two custom actions, which are installing DirectX and PhysX redistributable files. I use /silent switch on DirectX and /qr switch when installing PhysX.Ok, so my problem is that, when PhysX installation starts, I get a message:Error 1500. Another installation is in progress. You must complete that installation before continuing this one. (Buttons Retry and Cancel) (I'm attaching a capture here http://img231.imageshack.us/img231/5663/errormg.jpg)I guess it's messing with the actual game installation, which is still running on background.I've tried swapping DirectX and PhysX installation order, as well as /q switch (instead of /qr) for PhysX installer, which is the one failing after all. No success yet :( The only difference when I use /qr is that I don't get any error message... but PhysX still won't install properly.Any ideas on what could I do? Can I tell the game installer to install PhysX AFTER the game installation is complete?Any help would be appreciated. Thanks a lot! ;)   
  How are you calling the installers did you set your installer up to wait for a return before launching the next?.. if your calling them through shell commands it might be possible to just add another command between them that doesn't do anything. Like Start-Sleep -s 2   ;  Thanks for your response :)I just added them to the "Custom actions" list on Visual Studio setup and deployment project and changed their parameters on their "Properties" page. They launch one after another but I think the problem is between PhysX and the actual game installer (DirectX installs just fine whichever the installation order is).   