Okay, so when they made the pre-recorded tapes, one of the faults was that there was the same amount of time on each side, unlike the vinyl versions. So, some albums, including (I assume) Led Zep IV, had to be rearranged to fit the songs on 22 minutes per side. After doing the math this order/format seems the most logical: Side 1 Black Dog (4:57) Battle of Evermore (5:52) Going to California (3:31) When the Levee Breaks (7:08) Side 2 Misty Mountain Hop (4:38) Four Sticks (4:45) Rock and Roll (3:40) Stairway to Heaven (8:02)

I just researched the heck out of it and could not find anything else. Your reference is the only one I've found, but I am here to tell you you certainly weren't imagining things. At least two of these pre-recorded cassettes existed, and not coincidentally, both were purchased in Canada.

Yes! I had that same tape - felt a tad ripped off (many years later) that my first exposure to the album was not in its intended order. You are right about Black Dog being first and Rock and Roll and Stairway to Heaven being the last two tracks on the other side. I believe Going to California was the third song on the first side, followed by When the Levee Breaks. Misty Mountain Hop may have been the first song on the "other" side, followed by Four Stick or The Battle of Evermore. Gets a bit hazy, but now I know I wasn't dreaming. I hope you get this 10 years after inquiring. Can someone else verify this, as well?