This reminds me of a feature request I was going to make. Though I haven't checked the list I'm gonna post it here anyway

In the list of downloads window when you right click and in the search menu, have it search for the exact file, type, bytes and in the case of video's, dimensions, length, bitrate or what not. So for the it just just keyword searches for all types. So I get lil 34kb exe's for a 900mb file. LW just hasn't seemed to figure out how to make searches "smart" yet.