Dynamite official site is http://www.synce.org/
The dynamite source code can be downloaded from (so you eventually can compile it yourself in a cygwin environment):http://sourceforge.net/projects/synce/files/
IceCube, this paragraph I quote is the one that confused me. I apologize and I thank you for your help.
As you suggested, I am posting at boot-land forums, and in the meantime I'm still testing.
At boot-land, Wonko gave me a tip to resolved the Winimage Self-Extractor 8.00 problem in Vista.
When the floppy extractor program (memscope110.exe in this case) requests to insert a formatted floppy, don't do it. Click "ok" anyway. When it fails to read the floppy, the program gives the chance to retry. Just then, insert the floppy and click retry.
It worked! As I posted at boot-land, I guess
Winimage 8.1 might solve the problem in Vista. I didn't test it, though.
I will try your "dynamite" suggestion and I'll report back.