You could use something like this for your SFX comments:
CODE
;The comment below contains SFX script commands
Path=Medieval CUE Splitter
Silent=1
Shortcut=P, "program.exe", "Folder", "Description", "Program Name"
This would extract the contents to \Program Files\Medieval CUE Splitter, and create a shortcut in Start Menu\Programs\Folder. If you wanted to extract the contents elsewhere, you could use something like:
CODE
Path=%SystemDrive%\Programs\Medieval CUE Splitter
Search the forum for "winrar sfx" and you'll get lots of pages that can help you make sense of it, but it's pretty straightforward. And the easiest thing to do in your case right now is to run the SFX through the
addon maker, selecting the SFX as the installation file. You could also use WPI, or call it from GUIRunOnce or something of the like.