It's an SSD (256GB) in my Dreambox, so no worries about the never sleeping HDD.
I've got 2 picon directories (piconoled, XPicons) and one symlink to Xpicons (/media/hdd/picon to /media/hdd/XPicons/picon).
Furthermore I placed the skin_user.xml in etc/enigma2.
Is it working at all to show the really high resolution picons on the OLED of my DM800se?