Well Bax, I hate to give you no options...But I just downloaded and installed the package (1.8) from the link I provided up there on a clean Tiger install and it worked perfectly. Got right back the installation check tool and optimized without error and it loaded into the Sys Prefs. You must have something wrong with your tiger install or something. Also on the TiVo forums I haven't heard anyone having any problems with the installer either. I might investigate this if I were you.