If you're box is connected to your router you can use the addons menu (Yellow > Addons Manager > DK Server) to download and install different emu.
The skin...make sure you put the pictures folder in /var/tuxbox/config/enigma/pictures and the skin folder in /var/tuxbox/config/enigme/skins. If there are files missing or pictures missing, etc., it will try to load them and they aren't there so it will return to the default skin.
If you have a null modem cable you can connect hyperterminal and see what the box is doing when it boots and what error it shows.
Set the hyperterminal com settings to:
Bits per second - 115200
Data bits - 8
Parity - None
Stop bits - 1
Flow control - None
Reboot the box and it should say 'DREAMBOX DM500'.
When the following text is displayed, press backspace on the keyboard.
Add the following on the end.Code:Linux/PPC load: console=null root=/dev/mtdblock5 rootfstype=squashfs ro
So now it should read...Code:console=ttyS0,115200
Press Enter and the box will boot but will show you what it's doing in the hyperterminal window. When it reboots you will see what error occurs.Code:Linux/PPC load: console=null root=/dev/mtdblock5 rootfstype=squashfs ro console=ttyS0,115200