Change your system path on Windows Vista by clicking Start->Control Panel. In Control Panel's search box at the top right, type system env and click the Edit the system environment variables entry.
From here on, the instructions are the same as those on Windows XP. Click the Advanced tab and then the Environment Variables button.
In the System Variables box, double-click the Path entry and type a semicolon followed by your directory name, which in my case is:
;c:\support
Click OK three times and now every utility you put in the c:\support directory will be available by just typing its name in the Start search box or on the command line.
I put command line utilities and anything that doesn't create a Start menu entry into the C:\support folder. I'll cover specific utilities in other articles.