I have a DOS program with an Icon how can I change it

Hi Gang,

I have come across something that I wouldn't believe unless I'd seen
it with my own eyes, a DOS program with an icon.  Can someone tell me
how to change the icon, my company no longer has the source code for
it, but we want the icon to match the rest of the suite.  I know the
program isn't Win16 nor Win32 and I've tried about 10 resource and or
icon editors on it thus far and none work.  I don't even know how Quan
got the icon in there, but I really need to change it.  Any
suggestions?  Has anyone done this?  See screenshot:
http://www.fastandfriendly.biz/files/Dos%20Programs%20whose%20icons%20I%20need%20to%20change1.png
http://www.fastandfriendly.biz/files/Dos%20Programs%20whose%20icons%20I%20need%20to%20change2.png
http://www.fastandfriendly.biz/files/Dos%20Programs%20whose%20icons%20I%20need%20to%20change3.png

Download Zip of EXE [844 bytes!](if you're concerned about safety, go
ahead and scan it at VirusTotal.com, that's what I'd do):
http://www.fastandfriendly.biz/files/Dos%20Programs%20whose%20icons%20I%20need%20to%20change.zip

Thanks,
Christian Blackburn