DOSbox is for DOS programs, not windows.
it's possible to get windows 3.1 to work with it, but it barely works at all. Windows 95 or above are definitely not going to work!
to answer your questions:
-Do i have to mount C; every time i open the Dos box
well, it will need to be mounted, but you could use a startup batch to mount it; I can't recall the file DOSbox uses for this, but it's probably documented in the help.
-How do i get out of a folder to enter a new one with out exiting it and reopening.
As you are likely aware, "cd" or "chdir" changes the directory. However, there are also two "psuedo" directories in every sundirectory, single dot, and double dot. the single-dot is the same as the current directory; the double dot refers to the parent directory. also, remember that the slash \ refers to the root folder of the drive. Example:
C:\>cd games
C:\games>cd arkanoid
C:\games\arkanoid>cd ..
C:\games>cd ..
C:\>cd games\arkanoid
C:\games\arkanoid>cd \
C:\>
-can i play present games on in.
-if not is there a program that i can play pc games on my mac?
DOSBox is for older, DOS games. Not windows games. you will need to either have a Intel based mac and bootcamp and a windows installation or PC emulation software (such as VMware) and a windows installation to play PC games. Not that not all emulation software will work as not all of them allow for such things as 3d acceleration, which most newer PC games require.