Using an eMac 700mhz with 10.3.8 and plenty of ram.

I just purchased iLife '04 and cannot install it. The installer does not allow custom installation and when I run 'Install' it tells me that it cannot be installed on this machine because one of the packages is running. None of the components is in fact running and I restarted the eMac to ensure that.

Is it likely that it is because the iTunes and iMovie I have already on the machine are later versions? I downloaded 'Pacifist' to try a custom install, but that does not recognise the install box on the CD.

Anyone had a similar problem and may be able to shed some light on it?

TIA

Kevin