Hi apple,
you can test your application via emulator software like VMWARE they have trial version i guess. Also in WInXP you can set the compatibility of the program to win95,win98 and .. so on including protected mode. just create a shotcut of your .exe then right click the the shortcut then look at the compatibility tab.
Roses are #FF0000 Violets are #0000FF all my base are belong to you