[Freesurfer] cluster summary to MNI standard space

Hi,

I'd like to extract %BOLD-change from clusters or highly activated voxels (first level fMRI data processed in FEAT, higher level done with mri_glmfit).

Can you tell me what kind of space the cluster summary list created by mri_surfcluster refers to? Is it real Talairach space as TalX, TalY and TalZ implies it? Is there a simple method to transform those coordinates to the FSL standard space (MNI152)? That seems inevitable for me, since I use Peate (a featquery based GUI) to perform model related time series extraction. Or is it somehow possible to show the percentage signal change directly with freesurfer?

Thanks in advance Georg