I have just spend a couple of days trying to install TMSPE into our lab. But i kept getting an error during the install " TMSPE Setup Wizard ended Prematurely.
After going though the log i found the error message "Installation success or error status: 1603" which is actually a windows error message.
After trying many times with different users and passwords i can now advise that the issue was that the password i was using for my sa user was not compatible with the installer. I was using Today!@# as my sa password and after changing this to Today123 the install succeded with no issues at all.
The reason for this post is hopefully going to save you some time when doign this install if you come across this error message.