yeah, but if you just simply want to extract the EXE, using default options specified in the file's "comments" field, there are standard switches.
SFX executables created with WinRAR:
CODE
/S
SFXes created with 7-zip:
CODE
-y /q /r:n
You can even add the location to which you want the 7-zip compressed files to be extracted to:
CODE
-y /q /r:n -o"%ProgramFiles%\whateverfolder"