Thank you for help, I've hecked description of using recovery disk and it's the same, so should be ok. However I'm still getting info, that recovery files couldn't be found od SD card (tried with original recovery files - the same result).
Maybe something is wrong with SD card (format, or something, checked on two cards - the same result).
EDIT
Solved. The reason was bad card formatting - checked under original OS on minibook - handheld wasn't able to read SD card. I solved that using .. Nikon D80 camera to format SD card. After that card was seen under original minibook's OS. Then drag'n'drop, shiftl+fn+shiftr, etc.
Thank you all for useful and quick resnponds.
wicknix >> keep up the good work!
EDIT
I suggest to cut my problem to separate topic, as it's not directly connected with 3MX-rc2