Just goggled up a useful tip regarding giving priority to HD versions of programmes in Wishlists: You can create duplicate Wishlists based on a programme title, give one Wishlist a category of HD, and the other Wishlist no category.
Then give the HD Wishlist priority over the other, HD-less one. When TiVo finds a HD version of the programme, it will record it, and the SD version will be ignored due to the lower priority and the fact that the episode is a duplicate of the HD version.
If there is no HD version, then the HD-less Wishlist will record the SD version.
http://forums.tivo.com/pe/action/for...ie=x#e10430535