Most scripts have been improved and servers are no longer just the realm of UNIX gurus in wizard robes ruling the roost. This doesn't mean you can make mistakes, just that there is far less input needed from you to get the script installed and running. All of the scripts here have clear instructions. Especially when you are complimented on having a well functioning web site. A artful and beautiful web site is like a broken Rolls Royce.
Nothing is more saddening than looking at one broke down at the side of the road.
One key to remember and it should be the most important. All you are doing is implementing a script that is giving your computer directions. A good example is a macro. A poor one can ruin all of your work. A CGI script is really the same thing.