At first very good work! This is very handy!
I've got several suggestions, (I could also help out or so ):
In the Section Message Builder, it would be usefull to have a string format one could apply like in "Format Variant Into String__ogtk.vi".
Or and <string in> + enum(Type)>.vi: so to string parsed data can be wraped. -> <value><type><string in></type></value>
A VariantAsValue -> Cluster, recursion and stuff like this. Like in "Write Key (Variant)__ogtk.vi"
And vice versa: with Set Cluster Element by Name__ogtk.vi a name mapping within a cluster, so optional settings would be possible.
What do you say?