I cannot speak for Slackware, but I use Fedora and the Neuros is detected as a USB Mass Storage Device and it gets automounted by Nautilus. If it doesn't automount, it should at least detect it and you can see the device number it gets by watching /var/log/messages...Most likely it will be something like /dev/sda. Then you can just mount it with "mount /dev/sda /mnt/neuros"
After the disk is mounted, I use rsync to get the content over to my neuros. You could use copy or any other similar command, but rsync will copy over only what changed so it will be faster when you start adding content after your initial import...Here is the rsync command I use:
rsync -rvt --exclude *.png --exclude .folder --modify-window=1 --progress /media/source /mnt/neuros/music
I then use Neuros Database Manipulator (
http://neurosdbm.sourceforge.net/) to initiate the database rebuild. You can use NDBM to handle the content syncing as well, but I have 40GB of content, and it takes a REALLY long time to parse through everything w/o much feedback...so I prefer the rsync method because I can see what it is doing.
I have had my neuros 2 for about 9 months, and this method has been working well for me.
Hope that helps.
--Alex