For DosBox 0.74 Win3.11 with 32bit graphics & Soundblaster support, visit the following page -
http://digiex.net/downloads/download...11-dosbox.html
You'll need to edit the last bit of the dosbox.conf file (using notepad), to remove the securemode line, and then you can exit to MSDOS & mount whatever drive mappings you want to get to your games.
I've found this a really simple way of resolving the problems with games such as SimTower & SimLife that require Win3.11 (and SimTower needs an extended graphics set than the default one with dosbox too!)
Hope this helps!!