Dosemu howro?

May be I am just dumb but I have problems with dosemu. I have tried it with 7.2 and now with 7.3 but I do not understand how to run my dos programs else then copying them to my home directory. My Dos programs are on /dev/hda1 and are found under /DrDos. Dosemu or xdosemu are running but I have no idea how to go to their in dosemu. I have read the howto the readme the faq but seem to miss the part where it tells me how to get to an mounted or unmounted drive. Somebody with some hand on knowledge?