What do you mean you purchased a HUB with no internal HDD? The HUB doesn’t come without a HDD.
That would either be an SMP or you picked up a used one that someone removed the internal HDD.
If it’s the later, then no, you have to have the internal HDD for themes. If what you have is actually is a SMP then you need to check the SMP forum here: http://community.wdc.com/t5/WD-TV-Live-Streaming-Discussions/Darklight-for-SMP-Beta-UPDATED-9-10-2012/td-p/407350
HUB SMP
