Yeah, PAR is PAR

You can pack however many modules (scripts) you want, and invoke each using mybigfatexe fooapp ... via .bat/.lnk/shellscript/.exe

Same strategy would work for perlapp or perl2exe

You could also pack PAR::WebStart's perlws, and pack each app using its make_par, then invoke each app using mybigfatexeshortcut.lnk or mybigfatexeshortcut.bat, or mybigfatexeshortcut.exe which just does system perlws.exe mybigfatexeshortcut.pnlp

cava packager provides something like out of the box