Using thimbgen with movie files on wd live hun

Im very new at this and i got all my movies in the wd tv live hub Not on the computer so how can i use thumbgen without downloading all the media to computer? (because it takes a long time)

Map the Hub as a network drive.

In network:

double click on WDTVLIVEHUB;

right click on WDTVlivehub

click on 'Map Network Drive …";

pick a good drive letter, keep the name, and be sure ‘Reconnect at Logon’ is checked. Point Thumbgen to this drive and you should be good to go.