One more thing: access speed is also determined by the indexing block size that you use in the IDX index file. Bigger index block can mean quicker access for big files.

Yes, I do know that. However, trying to dump all 6 million POIs into one single top-level Search All POI category puts too much stress on the nav computer and makes searches slow. When I break them down into the six smaller sub-categories (as I have), then things work MUCH better. Searching is VERY fast (within mere seconds) as long as you keep the search radius down at 25 miles or less.

I haven't tried doing anything with the disc format or the directory structure in order to get more disc space. At this point I'm still shy about 250 MB and so I doubt that doing those things will make that much of a difference anyway. Thanks for the suggestions though.

Thanks OfficeMaven and CCFJ1 - I do know HTML, but had no idea our nav system was html based...

I guess I'll need to go explore the map data disc

d-