Thanks, I was struggling with the plugin actually loading, which is why the enabled switch wasn't having any impact. (I thought that 'enabled' was that function and had already enabled it but couldn't understand why it didn't work)
so had to change the plugin URL to url="%SWFPATH%/plugins/gyro2.js" and then it started to work as expected.
I'm really new to this and haven't much time to go through all the instructions!
Thanks for your help, all working great now.