A tutorial on using HDF5 files and a collection of MATLAB functions are available here:
RTXI HDF5 Matlab Files
It is no longer necessary to use the rtxi_hdf_matlabize utility if you are using these functions. These functions were re-written to use a low-level API to extract the dataset for synchronous channels rather than the “load” function to map the dataset to native MATLAB structures.
(Update 12/20/2012 – A bug fix has been applied to the previous script due to issues when >= 10 trials were recorded)