maybe creating entry in sudoers (just for scripts that need it explicitly), then calling them with 'sudo' inside program, would be easier approach?

If thats' what you've already tried, and no other idea pops up, sudoers entry for whole program (thus, running it with elevated privileges) would be ugly workaround. Yet, I'm pretty sure our main desired approach is do-able.

You've made garage.maemo.org project? If not, please make source available somewhere, so knowledgeable folks (= not me, probably) could look into Your code and check what may not look as it should.

/Estel