I then ran the following command : psexec \\* -u domain\administrator -p yourpw "\\domain.co.za\netlogon\trend client update\ipxfer.exe" -s trendserverip -p 8080
PsExec will now merrily enumerate your domain and update your OfficeScan clients. Don't worry if you see an "Error code 0 exit" error, the clients should still update. You have the option of specifying a file with a list of IPs or single hosts if the big bang approach is too cavalier for you.
Hope this saves someone some time...sometime.