[AAR.oner]

the checksums are either .md5 or .st5 or .ffp files

open xACT and click on the "checksum" tab
clck "add"...select the checksum file from the disc and press okay
then click "checksum" button...xACT will then verify the files and tell you if they passed or failed

also, check to see what the permissions are set on...that *could* be part of the problem