Can you use T Racks CS as an audio plug-in with Pro Logic X?

I'm hoping someone can help me here. I'm looking at getting Pro Logic x for producing/editing music. I have bought external audio plug-ins from IK Multimedia - T Racks CS etc. I originally bought it to use with Garareband but I've recently found out that its not possible. Is it worth buying Pro Logic and will T Racks run with it?

Please help