yes, the files on a mini image are all corrupt, because they aren't there
the mini image contains only the beginning of the cd where the corrupt sectors are which are needed for the copy protection to recognise the cd as an original..
if the game complains about emulation software on your computer, you either have additional software installed (clonecd or something like that) or you have daemon tools installed the wrong way. when you install daemon tools, you have to choose advanced mode and change the default names of the devices (i don't remember what the default names are, d467scsi or something similar).
-andy-