[eluser]kgill[/eluser]
If you can't connect using the CI sqlite database driver there's nothing stopping you from not loading it and instead using PDO, you'll miss out on using Active Record but in my opinion you aren't missing much.
I'm sure others here will have a different opinion on the matter but personally I dislike AR, when you start getting into complex queries it tends to hit its limits pretty fast and you end up having to jump through hoops just to satisfy its limitations. When I found myself interrupting my workflow just to make AR happy I dumped it & the DB class and instead loaded a PDO object to get at my Oracle DB.