@blobrana: why should this be a problem for WinUAE ? WinUAE uses Windows to access files like any other application, too. Data encryption/decryption is not the job of an application. An application always sees plain unencrypted data, even if Windows encrypts it internally. It's Windows' job to decrypt it before the application sees it and to encrypt it after the application has written it to the output buffer.
Bye,
Thomas