my laptop has no optical drive and currently don't have an os..as i was searching the net i end up here in this site which seems so helpful..then i've read about this MS-DOS 7.10 CD Full Installation..that is seems to be helpful but i don't know what the next thing to do..can somebody help me..?

http://www.syschat.com/install-windo...py-cd-463.html

That is the tutorial for what you are trying to do...follow it exactly and you should have no problems.