Austin,
The KiX SHELL command enables you to run a program. %comspec% is an environment variable the points to the command interpreter need to run certain DOS programs and internal DOS commands which include batch commands. On NT systems %comspec% would likely be "C:\WINNT\system32\cmd.exe" The /c switch, actually "C:\WINNT\system32\cmd.exe /c" tells the command interpreter to run the command that follows. You can do a "CMD /?" from a DOS box for more info.
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.