If you make a multi-install, do not delete any of the
B?EXEC-SYSTEM folders or any of the
osd*.elf files inside them!
Doing so might result in data loss. Do not delete
uninstall.dat from the
SYS-CONF folder either, or you will probably be stuck with the multi-install files forever.
Also, multi install has proven to be capable of causing random corruptions of the memory card, unlike the normal install, Wich is safer.
Make sure to format the HDD with wLaunchELF 4.43x_isr before installing FreeHdBoot, DON'T USE WINHIIP OR ANY OTHER OUTDATED TOOL.