I use the My Book Live version but I think it is the same for the creating of the Twonky shared folders.
I connected with ssh to folder:
/usr/local/twonkymedia-5
There is a file called twonkymedia-server-default.ini
which contains:
contentbase=/shares
contentdir=+A|/Public
followlinks=0
radio=0
readdbondemand=0
scantime=-1
friendlyname=%HOSTNAME%-Twonky
ignoredir=AppleDouble,AppleDB,AppleDesktop,TemporaryItems,SmartWare
suppressmenu=mediafeeds,transcoding,divAutoShare,network
startupmb=1
disablelocalssdp=1
streambuffer=131072
dbdir=/CacheVolume/twonkymedia
cachedir=/CacheVolume/twonkymedia
nicrestart=1
uploadenabled=1
uploadmusicdir=/shares/Public/Shared Music
uploadpicturedir=/shares/Public/Shared Pictures
uploadvideodir=/shares/Public/Shared Videos
maxidletime=0
Furthermore, in folder:
/DataVolume/cache/twonkymedia
a file called twonkymedia-server.ini
which contains:
# uploadmusicdir
uploadmusicdir=/shares/Public/Shared Music
# uploadpicturedir
uploadpicturedir=/shares/Public/Shared Pictures
# uploadvideodir
uploadvideodir=/shares/Public/Shared Videos
# onlinedir
onlinedir=/CacheVolume/twonkymedia/twonkymedia-server-online-data