I fixed it!
Granted, all of the PCs in our environment are running uVNC in some form or another; however, the following action fixed what I needed for my specific need:
{actionpath}vnc.exe {computer}
It pops with the credential window and EVERYTHING.
Now, if there was a way to magically make the standalone access ANY pc that DOESN'T have VNC installed, that would be better for others...
However, all that being said, the simple action above proved to work flawlessly!