We've got a batch of 30 laptops here that don't allow everyone to use office

when started up it will do its install bit but stop half way and give error 2503 and then 2502 but doesn't actually tell you anything

when you cancel all that away and get in to the program (Word for example) it says:

Microsoft Office Word is not installed for the current user. Please run setup to install the application

i've looked into this problem and this is meant to be because office has only been installed for one user instead of all users. except that my office.mst file has the allusers="2" line meaning everyone should get it

any ideas?
its driving me crazy