To build and run the src code, 

1 download cohesion-1.0-src.zip
2 Extract into a new directory.
3 cd into src\bkasrc
4 type: "make" to compile and then 
5.1 To run the client type: "make client"
5.2 To run the server type: "make server"

From a development perspective there is a large number of possibilities for work.
The most obvious of which is to improve and extend the current modeller 
functionality and its associated services.

The other approach would be to develop your own plugins using the cohesion 
application framework. We already have a number of interested third party 
developers who wish to write their own stand alone applications within the 
Cohesion frame work.

We would appreciate hearing about any third party development efforts going on.

Finally, you should be aware that there is no current plans for any further "
official" development of either the application framework or the modeller itself.
It is now an OpenSource project which we intend to improve and update in our 
spare time. Therefore any contributions to its development would be appreciated.