WinMount avoids to decompress and compress again files when it is necessary to extract info inside them. It's easy to mount a file on the virtual drive, you'll only have to drag and drop the file you want to mount, as if it were an usual drive.
Let WinMount do the rest. No problems for you. Finally, thanks to WinMount you'll be able to create virtual drives from BIN, MDF and MNT; and generate RAM drives.