This is my pet project:

SE Asia Garmin Map based on OSM Data

WOW, I will most certainly check this out.

Can people help, and if so how ?

From the website:

A simple way to help is to upload your track logs to OSM.

Edited September 17, 201411 yr by MJCM

Welcome aboard!

Go to www.openstreetmap.org and sign up for a user, all you need is an email address. Then you can upload any tracklogs you want to share. You can also edit the map with the built in editors.

thank you bump I have been looking for something like this for my old Garmin 205w !