my WD live book didnt come with twonky built into it , how can i get it on there .

Supposedly you can overwrite the firmware with stuff you can find on the internet (if you search) and that will restore twonky 5.1.9 which comes on the older MBLs.

Otherwise, you can install the latest and greatest Twonky if you buy a license for it, and there’s a wikidot guide on how to do that.   (Again, search will find it.)