To install: Insert disk in CD drive Go to Windows Explorer Go to the CD and double click on Protel99se_full_trial_Version_zip.exe Follow on screen instructions (use default file pathes) When finished double click on protel99servicepack6.exe follow on screen instructions Unzip protel99_sp6.zip (using winzip) Place protel99_servicepack_6.exe in the following directories: c:\program files\Design explorer99se c:\program files\Design explorer99se\system and double click on the files in BOTH LOCATIONS This should unlock Protel for use beyond 30 days. Please do NOT use this version of Protel for any profit making endeavor....buy a copy!