First, thank you for posting ftp.zip file. I found it very useful. I have some problems with USB transfer so I think that FTP is very convenient. But, I can't access to my SD card using this method (FTP). I tried with "mount" script:
mount --bind /media/sd /media/flash/sd_card
and now I can read from SD but I can't write to it. I also tried to change permission but no luck. Since I think this really nice and useful method for transferring files, do you have any more informations which can help? Maybe problem is in ftp server on M92?