I’ve been threatening to write this for a while now and it’s finally done. For many years I have owned VueScan. For almost as many years I could not figure out how to do multi-frame scanning. Then on about my fourth attempt I cracked the code. No-one else seemed to be covering it in any detail, so I have.
The hard part was all down to setting six numbers, in the right order, but I fleshed it out into an entire workflow with a number of recommendations and a few gotchas.