Just read a few posts with sqlite issues & thought I would offer a suggestion.
There is an excellent Firefox add on ( as a Firefox extension) called Sqlite-Manager.
And yes it works with the new ver 3.0 of Firefox!
It is small, intuitive and easy to install.
Get it here:
HTH - Dave Porter
p.s. Just added this addendum - this does not replace the requirement to install sqlite - it just makes manual changes easier...