What is the version number of your PM. There is a patch to upgrade to 8.01 to get ride of some problems click here.
I believe that there was a later version 8.02 and upgrade was available in Powerquest.com, but cannot find it anymore. I was told the latest version is 8.05, but cannot find any info in Symantec wev site.
There are some programs not working with SP2, but I do not think PM is one of them. But, many software program can be fixed by upgrade to latest version.
£60? seems overpaid, only £29.99 at Amazon click here