Hi JMA,
I restarted from scratch. Downloaded all sources from bazaar. I am now
on revno 2579, updating server and addons and extra-addons. 
I had still to correct manually the following 2 basic bugs:
-  the pixmaps directory not copied during setup and 
- base/res_company.py line 191 as followed:
#            tools.config['root_path'], '..', 'pixmaps',
'openerp-header.png'),
            tools.config['root_path'], 'pixmaps', 'openerp-header.png'),
#EC

I could finally get to the point that at least I get the first database
created. I arrived at the first setup wizard and ask him to install all
modules and I still get this:

Environment Information : 
System : Linux-2.6.32-22-generic-i686-with-Ubuntu-10.04-lucid
OS Name : posix
Distributor ID:	Ubuntu
Description:	Ubuntu 10.04.1 LTS
Release:	10.04
Codename:	lucid
Operating System Release : 2.6.32-22-generic
Operating System Version : #36-Ubuntu SMP Thu Jun 3 22:02:19 UTC 2010
Operating System Architecture : 32bit
Operating System Locale : fr_FR.UTF8
Python Version : 2.6.5
OpenERP-Client Version : 6.0dev
Last revision No. & ID :Bazaar Package not Found !Traceback (most recent
call last):
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/netsvc.py",
line 407, in dispatch
    result = ExportService.getService(service_name).dispatch(method,
auth, params)
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/service/web_services.py", line 584, in dispatch
    res = fn(db, uid, *params)
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/osv/osv.py",
line 57, in wrapper
    return f(self, dbname, *args, **kwargs)
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/osv/osv.py",
line 133, in execute
    res = pool.execute_cr(cr, uid, obj, method, *args, **kw)
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/osv/osv.py",
line 123, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/addons/base/res/res_config.py", line 183, in action_next
    next = self.execute(cr, uid, ids, context=None)
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/addons/base/res/res_config.py", line 415, in execute
    pooler.restart_pool(cr.dbname, update_module=True)
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/pooler.py",
line 62, in restart_pool
    return get_db_and_pool(db_name, force_demo, status,
update_module=update_module)
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/pooler.py",
line 39, in get_db_and_pool
    addons.load_modules(db, force_demo, status, update_module)
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/addons/__init__.py", line 830, in load_modules
    r = load_module_graph(cr, graph, status, report=report)
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/addons/__init__.py", line 688, in load_module_graph
    modules = pool.instanciate(package.name, cr)
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/osv/osv.py",
line 187, in instanciate
    res.append(klass.createInstance(self, module, cr))
  File
"/usr/local/lib/python2.6/dist-packages/openerp-server_9920/osv/osv.py",
line 260, in createInstance
    assert pool.get(parent_name), "parent class %s does not exist in
module %s !" % (parent_name, module)
AssertionError: parent class mrp.procurement does not exist in module
library !

Let me know if you need more information or copy of the database

Eric