How to use T4 template
Download source code and edit Jlob.OpenErpNet.Templates.
There is a OpenErpEntities.tt template, edit line 20 with your server parameters
OpenErpService openErpService = new OpenErpService("http://192.168.73.128:8069", "POLTEST", "admin", "admin");
Then save and OpenErpEntities.cs will be populated with class from OpenErp.
!!Warning
A field of select type in OpenErpMap is mapped as string, in next versión will be generated as enum.