Antique furniture touched with modern accents, plus imagination and hard work-that's the combination Barbara and Ed Dreschler used to make their half of a duplex-a 20 by 20 foot room-into a comfortable college home at 3210 West street, Ames. They squeeze in work while Ed, a chemistry major, attends classes at Iowa State and Barbara, a '45 textiles and clothing graduate at Iowa State, designs draperies for a Cedar Rapids firm, in her home.