If my subwoofer has no LFE input...

Rich, the only way to get the LFE content in the mains is to select the no subwoofer option. The LFE, LFE+main is what goes to the sub, not the fronts. I've tried both, and greatly prefer the LFE only going to the sub. LFE+main causes some weird phase cancellations between the sub and full-range mains. However, this can be a good way to use the sub to extend the range of nearly full-range (40Hz) mains set to large. You set the sub output to LFE+main and set the sub's crossover to a very low frequency, such as 30Hz, to provide bottom fill only. This works better for audio than HT.

Rich, I certainly see how you could interpret it that way. My 5800 manual words it a little differently. It says "When the LFE+Main playback mode is selected, the low frequency signal range of channels set to large are produced simultaneously from this channels and the subwoofer channel." It doesn't say the LFE info is also present in the mains. However, if you set the fronts to large, the surrounds to small, and the sub to off, the fronts will get the bass content of the sub channel and the surrounds mixed in with the bass content of the fronts.