The new version of Matlab for Macintosh, R2006a, the license file and instructions for installation are available on //macsww/public/PPC/matlab.
Navigate to //macsww/public/PPC/matlab/R2006A/disk1 and double click InstallForMacOSX to install. The installer will prompt you to select the files corresponding to CD’s 2 and 3, which are disk2 and disk3.
Cut copy and past license.txt when prompted.
Be careful not to install the license server.
To delete a previous installation simply drag /Applications/MATLAB7x to the trash.