I need to index ansqlite database. What do I do to do this?

I think I need to create a protocol handler which will represent a store - that store being my database file, and an IFilter to return data from the database.
I understand there are two types of protocol handler -Asynchronous Pluggable ProtocolsandA Registered Application. What type of protocol handler does WDS use?
If I am understanding right, this protocol handler is known as a store in WDS, how is the store\handler registered with WDS? Will the protocol handler will be specific to my database - ie it will represent my db as a store, not all sqlite.
I was thinking about bastardizingCodeProject - A Simple protocol for my protocol handler. However this is C# CLR - is there likely to be a problem with unmanaged code running managed code?

When do things happen in WDS? Is this right?
At some stage the WDS gatherer will start to build the index.
WDS loads its registered protocol handlers.
My protocol handler will access the database and return a series of key\value pairs to the indexer.
Where does the IFilter fit in?


Where to start?
Do I need to create a new store?
Using Database and Template for IFilters
Introduction to Protocol Handlers
How to create a custom protocol handler and content source for the protocol handler in SharePoint Portal Server 2003
(what do wds and sharepoint have in common?)