The tutorial is fine and all, but here's a big, fat warning:
DO NOT MOUNT THE ROOT OF YOUR C:\ DRIVE IN DOSBOX!
The reason is simple: by mounting your real c:\ drive as the emulated c:\ drive, the emulator (DOSBox) has full write access to your real c:\ drive, and all directories on it. If anything goes wrong inside the emulation, or if a malicious program writes to c:\, your data could be destroyed, deleted or damaged. It is _very_ simple to work around this: just create a special directory for mounting DOSBox's virtual c:\ drive to.
Step by step:
- In windows, create a new special DOSBox directory. This directory can be anywhere on your harddisk(s). Example: use explorer to create c:\DOSPrograms or d:\DOSPrograms (in ErikGG's example above, that directory is called DOSBOXC).
- Inside DOSBox, mount the directory you have just created as the virtual c:\ drive. To do this, type "mount c: c:\DOSPrograms".
That's it. DOSBox will use the directory you have mounted as a virtual c:\ drive. The risk of data loss or corruption is now minimal, because there's only DOSBox-related data in this directory, and DOSBox has no write access "outside" this directory.
If you have already installed games to your real c:\ drive, simply move the directory holding the game (in this case, it could be c:\WAR2) to the DOSBox directory you have created. If you mount that directory in DOSBox, as i have described, the game's data will still be in c:\WAR2 for DOSBox.
The whole concept of virtual directories is a bit confusing at first, but you'll soon understand it, it's quite logical. There's absolutely no reason to use the real c:\ drive for mounting.