Ok, it sounds like you haven't set up the correct path to NearInfinity in Hide NI DOS. To do this, create a .bat file in the same folder as "Hide NI DOS.exe" and add the following lines:The dos command prompt screen flashes too quickly for me to see what the problem is exactly, but after multiple times proving that it's faster than the eye, I did see something that looked like it couldn't find the .jar, or didn't recognize the file format or name of the beta 20 NI .jar file. I have Java 6 update 27 installed, so I'm not sure what the problem is. [edit] It's definitely not Java as I can run various versions of NI fine as long as I launch the .jar file itself; just can't get the HideNI app or any .bat files to launch them.
"Hide NI DOS.exe" -config "Hide NI DOS.exe" -aboutThen run it. On the config menu, select the path to your NearInfinity Java ARchive (*.jar). You can change the other settings here as you please. (It did explain all of this in the provided readme, but I keep forgetting no one actually reads the readme...)
Does it work now?