Hi Pete,
No, it is much easier. By using the std.141 surfaces, you already have node correspondence. Now just display the results on an MNI surface dataset, like the one that I linked to.
Looking at your link to Mike's openwetware site, that is what he is doing in the section "Displaying the Average Functional Data". He copies the MNI_N27 surfaces to the results directory, and uses those standard space (not just mesh) surfaces for display of the newly created surface data. You could do something similar.
- rick
