In general it's not a good practicce to name a computer after a person - if
you do, then (for example) you will have to change all the shared folders and
printers on it when that person leaves.
However, I don't think that has anything to do with your problem. What has
happened here is that the original user-account, named dianne, has been
renamed to jennifer. Renaming an account doesn't rename the profile (because
it would cause too many issues if it did) hence you end-up with a situation
where the profile-folder's name does not match the account.
The textbook answer is to create a new account for each new user, instead of
renaming exisitng accounts. Downside of course is that the new user has only
the default settings (inherited from the default profile) and so any
recently-installed programs may not have the required settings.
You can copy the files from one user-profile to another, but transferring
the settings (user registry-section) is inadvisable as it wil almost
certainly contain direct references to files within the old folder.
BTW, the reason the profile-copy is greyed-out is most likely that one of
the users is logged-on. You need to logon as Administrator (or any thrid
user) so the profile isn't open.
-------------------------------
An alternative approach to XP network logon -
http://mylogon.net