domi,
Where did you get this firmware from?
The checksum error means that the file is not being read at the proper size. Your FWIMAGE.FW contains all the files listed in the long list but it is to small 2.92MB it should be around the 6 or 7 MB mark and there appear to be some files missing from it. Nothing you can do to fix it sorry.
If your player is recognised as an ADFU device it is in recovery mode and you need to use a Full Version Firmware, your player will not accept a dump while in recovery mode. There are some full versions
HERE
I suggest you read the DEAD PLAYER RECOVERY GUIDE
HERE and scroll down to the section regarding ADFU install and then proceed on from there,