Add autorun routine to it from Karenware Tools at
http://www.karenware.com/powertools/ptautorun.asp maybe .... Never used it for pen drives, might only work for CD's and DVD's, but couldn't hurt to try it and its free... :-/
Also because of the spaces maybe try this: "\applications\portable application Menu\startPortableAppsMenu.exe" in your code.... just as seen with " " and @Echo. vs Echo :-/
@ECHO OFF
@ECHO. Running Portable Applications Menu.....
"\applications\portable application Menu\startPortableAppsMenu.exe"pause