We got it after a while but instructions to install on Windows are incomplete on official OpenERP website. - Install and setup PostgreSQL (user for OpenERP to setup and don't use default postgreSQL user) - Install and setup Python (PYTHONPATH, Path in windows) - Install Python packages needed by openerp-server with "pip install" or distributable - Install Python packages needed by OpenERPServerService with "pip install" or source code (PyWebDAV-0.9.4.1 was needed and not the latest version!!!) - Generate openerp-server distributables with "py2exe" including openerp-web addons (with the distributable we are not able to have multiple "addons" folders) - Generate OpenERPServerService distributables with "py2exe" - Create the Windows Service with "sc create" - Install OpenERP as Python package (run puthon.exe setup.py install) - Setup Eclipse environment with 3 main projects, templates for XML and template for python code to be able to develop.

I didn't go in detail here but there is clearly not enough official instructions to achieve all those tasks without headaches! Some details were driving us crazy like PyWebDAV version, single addons folder for dist, server and service folders structure so the service could call the server application successfully...