The package that you would have exported, will contain the DB related entries of the uploaded files, like the file name, upload date, MD5 name, etc.
The actual file name gets changed during upload and gets changed to the file name's MD5 hash equivalent. It's uploaded on the application server's file system in the following directory: /usr/local/neolane/nl6/var/res/<Instance_Name>/ if its Linux and <Installation_Directory>\var\res\<Instance_Name>\ in case of Windows.
So you need to copy all the files in the above-mentioned directory to the same folder present in the other ACC app server's file system where you imported the package earlier. The images will render post that.