Before I can answer your question, I need to make sure that we have
our terminology correct. (My definitions)
User: A user is an account allowed to login to PWA.
Resource: A resource is specified in the Enterprise Resource Pool. A
user account is also created automatically for all resources so that they
can login to PWA.
A user (in PWA only and not in Enterprise Resource Pool) can be
deleted within PWA by merging with another user. A resource cannot be
deleted from PWA through normal means.
If you want to delete resources, the only way to do it is to use an
SQL
database script. Take a look at the following page to try it. I
would
recommend backing up the database before working with this script.
http://www.microsoft.com/technet/prodtechnol/project/project2002/reskit/ps02/psmgmt/pscustom.asp.