configuration files dosbox portable 0.72

I am using the original version of dosbox to run some old programs. I thougt it wasn't easy to drag my programs into the dosbox icon, or to mount it every time, so I came up with the folowing sollution:

i made a few configuration files, and in the autoexec area, i typed the lines wich i used to mount my programs. I did this for every program.

Next, i wrote an .bat file, and i made a menu in it. the shortcut to my programs became this: start (location dosbox) dosbox.exe -conf (location custom .conf file)conffile.conf.
What happended: dosbox started, and automaticly mounted and started the program i needed.

when i try to do this with dosbox portable, the program still uses the original configuration file.

Is it impossible to make it work (so is this a bug? thats why i chose this catogory) or does someone know how i can make it work, or maybe there is an easier way to automount with dosbox?

please react.