To give you more details for the installation:
1. Unzip the file btk-0.3.0_Win7_MatlabR2009b_64bit.zip
2. Copy the folder ‘btk’ where you want
3. Open Matlab
4. Use the ‘Set Path’ button
5. Add the location of the folder ‘btk’ only (not its subfolders)
6. type ‘help btk’ in Matlab
With these steps you will be able to read the documentation associated with the toolbox ‘btk’.