Setting tricky metadata using web services

[martin_cowie]

Can anyone tell me how to set the attributes …

{http://www.alfresco.org/model/content/1.0}modifier
{http://www.alfresco.org/model/content/1.0}modified

… as whenever I use RepositoryService.update() to set these (as well as other) attributes, the very process of updating the node would seem to re-write said attributes … overwriting my own values. 

I'd also be very grateful to know how to create a document with a version-comment. Currently this only seems to be possible using the AuthoringService.checkIn() method - and that only applies to documents other than version zero.

M.

[kevinr]

These values are system managed and cannot be set directly.

Thanks,

Kevin