I recently downloaded Jazz Jackrabbit 1 and I can't turn it on by clicking on the .pif file. I tried to open it in MS-DOS but I have no idea how to do that. I looked at the instructions, moved different files different places and still nothing happens. Here's what I do:

C:\WINDOWS>CD\

C:\>CD\JAZZ\
Invalid directory

C:\>JAZZ
Bad command or file name

I don't know what to do. Please help.