Fetch DB File From Server and use the SQL C API to work with file at run-time.

Question

I realize that I can't write to the app bundle at runtime. I had originally thought I could simply download a file to the application bundle which would in turn be read by my application.

NSURL *url = [NSURL URLWithString:@"http://www.drewcarpenter.info/shopping.db"];
 ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
 [request setDownloadDestinationPath:@"dbFilePath"];
 [request startSynchronous];

Where dbFilePath is a reference to the Documents folder in my app bundle.

How can I retrieve a DB file from a server and in-turn use the SQL C API to interact with this file at run-time?