Yeah, I was gonna suggest this. You could even do as many as 48 half hour increments, if you want to maximize how much security video you get. This idea would even work well with season passes and wishlists. Make sure your umpteen manual security recordings are last in the priority list, is all. Very early on in my TiVohood I sent a suggestion to TiVo (or posted it here?) that these would be great for security footage.