You can already do this. Just double click tools on the left and you can add all the custom tools you want. I have them for remote desktop, VNC, SSH, and a few custom URLs. You may have to find out how the commands work though. with vnc you can just put
Of course it doesn't. How would it know?
A space is used as a separator between the various parameters, so it's perfectly obvious that you can't use one in a path name.
Blame those idiots at Micro$oft for the stupidity of putting spaces in path names.