Add ifconfig -a and /boot/recalbox-boot.conf in recalbox-support.sh; S99Custom now trasmits its init parameter to custom.sh; Bumped retroarch to v1.3.4; Add ipega 9021 rules; Added stat in busybox; Corrected favorite display in gamelist; Download recalboxOS-4.0.0-beta4.zip and see the Installation wiki. Create a folder named “retropie”. Plug it once in the Raspberry Pi and wait for 30 seconds. Plug it again in your computer and copy the ROM files in the “retropie/roms” folder. Plug it again in your Raspberry Pi and wait until USB stops blinking. The files were copied, restart Retropie to.