lxappearance not working with openbox session

[Max]

I'm trying to use lxappearance with a 'bare' openbox-session.
i discovered that lxappearance is not more capable to write the gtkrc2.0 
and gtk3 settings.ini files.

what packages are required to make lxappearance work also with a minimal 
desktop install?

furthermore.. i don't know if this could be considered a bug to be 
filled. i found some qt applications that can't read themes settings, 
also in a full lubuntu desktop,  leaving the users with the only option 
to write a gtkrc-2.0 file by hand.
so i think that it should at least to be an option to also write the gtk 
settings files.

please forgive my bad english, i hope to have been clear, anyway


Max Franco