great system
many thanks!
left it backup during night

but found this error:

Error: Error while saving e-mail
Ignoring this error message.
If you want, please report the following traceback at www.gmail-backup.com/forum
Thanks! (gmb.py revision 691):
Traceback (most recent call last):
File "gmb.pyo", line 1225, in backup
File "gmb.pyo", line 956, in store
IOError: [Errno 13] Permission denied: u'G:\\GmailBackup\\2007_05_20070510-152102-donotreply@ateonline_co_uk-Gaming_CEO_panel_evening_invite.eml'

I think it just kept on doing that whole night! ;(