HbbTv support was added into the ViX images from builds 450 upwards, this is provided in the form of a plugin rather than going down the dubious route of releasing a HbbTv and light image. This is as a result now also available to ALL OE-Alliance teams as well.
Menu> Plugins> green button> extensions> hbbtv ( not the ones ending in -po or -src ).
also be aware that the solo has very little memory so HbbTv may not work at all on this receiver.
Glad to see it working on other images nice feature the Plugin and i see the point of not having different images, But then again it has been available in Blackhole since august so other teams have had time to refine it so to speak.