7zip to extract mdf file?

I have to file mds need to copy files from the iso.Mdf but can not document the need to copy files from dat.I used alcohol and damaen tools have been tried, although the player can open, but there are always a few dat file can not copy, in particular, a number of documents dat last two.
yesterday, it was suggested that I direct 7zip extract mdf file.7zip but I have not the official site of the mdf extract features.
Which tells me; in the end it all right?

Have called “simple virtual drive” software, you try to use It can load.