DOSBox Portable 0.72

DOSBox Portable emulates an Intel x86 PC, complete with sound, graphics, mouse, modem, etc., necessary for running many old DOS games that simply cannot be run on modern PCs and operating systems. While not restricted to games, the emphasis has been on getting DOS games to run smoothly, which means that communication, networking and printer support are still in early developement. 

Publisher: PortableApps.com and the DOSBox Team
System Requirements: Windows 98/Me/2000/XP/Vista
License: Free / Open Source (GPL)
File size: 1.3MB (download), 1.5MB (installed)

Here links:

http://letitbit.net/download/4d9bac87071/DOSBox-Portable-0.72-Rev-2.paf.exe.html

http://uploadbox.com/files/E2u9g768Vk

http://depositfiles.com/files/j2grzvsk8