Hi Ajay,
I have indeed changed approach and am now looking to go from SP3 to SP5 which will support Tomcat 7.0.27. I need to take the shortest route for our PSN Compliance testing.
Our business objects software is supplied by Northgate, but seems that the Tomcat upgrade install is not included by Northgate.
I am assuming I can go from SP3 > SP4 > SP5 > SP7 then upgrade Tomcat 5.5.20 to Tomcat 7.0.27?
This will meet the requirements placed upon us by PSN, after which I will then look at moving to SP7 and a more recent version of Tomcat.
Thank you for the help. No doubt I'll be back to pick your brains in the near future!