What's the difference between 'ASPI' and 'File' mode?
In ASPI mode, you will get an ISO file with exactly the same structure as the original CD-ROM disc, with bootable information, and all other internal disc format. If you burn this CD image file to a disc, you get a exactly same disc as the original.
In FILE mode, WinISO will create a new ISO file by copy all files and directories on the disc. This ISO file will use WinISOs default format. If the disc is bootable, then the bootable information will be lost.

问题是，我使用aspi方式时，winiso警告我无法进行，才不得不改为file方式的。。。