Download the latest version of the software from the thread you linked to. Start from the bottom and work your way up the thread to get the latest (I think it is v7)...
Load hijack, if you have not already done so. This (at minimum) gives you an ftp daemon on the player.
Follow Mark's instructions, that I have quoted below.
site rw
cd /empeg/bin
chmod 755 set_empeg_max_fix.v7
site exec /empeg/bin/set_empeg_max_fix.v7
site ro
site reboot
This should work. If, for some reason you find that it does not, post your errors here for further checking. Worst case (if you do not have the network settings configured on your player), you can always upload it via serial and run it from the console of the player...
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Paul Grzelak
200GB with 48MB RAM, Illuminated Buttons and Digital Outputs