Is there an overall map of where all the modules go?

[Solomoriah]

Basic Fantasy doesn't have one world, it has many. I run games in Glain and (variant FFC) Blackmoor, and I've run games set in the Western Lands. Others use other worlds.

[Hagakuri]

This may already be a dead horse but I found some great maps, most free, on sites like RPGnow. My favorite map cost me $1.39 and I can alter it with paint to suit my needs. Yes, things like Gimp are way beyond me.

[Scheldrake]

This isn't exactly what the OP was asking but I've gotten a lot of mileage out of Dyson Logos' maps as well as this guy's stuff:

http://blog.trilemma.com/search/label/adventure?m=1

Beautiful, imaginative work and goes well with BFRPG. I think he even has a full setting he's working on.