Thanks for the prompt replies.
I can only guess that my Sims Workstation settings under Site Settings must be incorrect.
I have pointed the install paths and ini files to their local paths on the server but still only the Solus3 client installs on the computers.
Has anybody successfully used Solus3 to deploy a new sims.net because I have spoken to their helpdesk a couple of times and they still can't confirm if/why it will not work.