This site provides [near-]zero support for any game that is obtained through an [illegal] downloaded. Abandonware only exists in the minds of those who want it to. However it is a grey legal area and so companies/individuals seem to tolerate its existance.
RTFM is a commonly used term. If I'd wanted to swear at you, I would have done! No, I'm not a gentlemen and I don't mind not being one either. I hate to see lots of posts with 'I got my free game, someone please get it working for me'. You may/may not fit that description exactly I know.
Read up about DOS, read up about directory management and finally read up about DOSBox and how it provides what it does (not the technical nuts and bolts). DOSBox doesn't make DOS [or the games] any easier. In fact their usually slightly more difficult given the need to adjust settings for some games be that mounting CDs, adjust speeds, etc. Search using Google and/or this forum and you'll find lots of answers already.