You have to first be able
to register the new template with the Crosswalk SDK
Do you mean by using the CXSIParser::dotXSISupported()::Add(
CdotXSITemplate *i_Template,
SI_Int i_nPosition) function ?
then modify the exporter to
get the data from the scene and generate the new template, then build it.
I don't understand this part, what do you mean by modifying the exporter, and how do you generate the new template ?
For the default templates question, I know that I can ignore them, but it's simply because I like to get things as clean as possible, so if I can remove templates that we won't use, why not ?