asterisk users - Mar 2006 - Help! Directing Inbound calls to different extensions

OK, Asterisk Newbie

I've read TFOT and the Asterisk handbook and lurked, but my skills are a bit
poor so perhaps someone could  post a dialplan fragment to help me

Brief details 

Asterisk@home 2.6 installed on a miniITX system 
Digium 400 card with 3 FXO modules 
3FXS interfaces by Iaxy (1FXS) and Linksys PAP2 (Sipura 2002) (2FXS) 

I started with AMP to get going but have started re-writing the dial plan a bit
to get what I want.

What I want to do is direct each FXO to its own extension so when a calls come
in I want the following to happen

Zap/2 comes in it goes to extension 102 
Zap/3 comes in it goes to extension 103 
Zap/4 comes in it goes to extension 104 

I tried using DID in AMP but this doesn't work for me. 

I tried a dial plan fragment with "Zap/2" and "Zap/2-1" as
the extension string but that did not work either.

The extensions are correctly set and I get phonecalls, but only the AMP default
incoming route is used.

I would appreciate any simple dialplan for direct entry or an idea of how to do
it in AMP.

And I can't seem to get UK ringtones. I tried changing the country code in
indicators.conf but I still get US ringtones. Any obvious ideas to try?

Thanks 

Rajiv