Some games use multiple .conf files and leverage a shortcut approach with params. for example:
.\DOSBOX\DOSBox.exe -conf "..\dosbox_ad1086.conf" -conf "..\dosbox_ad1086_single.conf" -noconsole -c "exit"
there appears to be no way to execute this same type of command once inside of dosbox and the content has been mounted
either supporting a .lnk execution (which seems unlikely) OR selecting the .exe but allowing a commands param string should solve this.