skalogryz, thanks, I'll try that, I didn't know about it. Up until now I've been changing SelStart and SelLength and then setting SelText, because doing it that way doesn't mess up the justification, I thought that that was the True Way.
I have got the pictures to work. You'll laugh at me, but I guess I was taking the notion of inserting the picture in the memo too literally, I thought once I'd done the insertion I should free up the TPicture and the TRichMemoInlinePicture like a tidy coder. It looks like I have to keep lists of them, one for each picture, instead.
Couple of questions. Is there any way to center the pictures? And is there any easy way to resize them once they've been inserted? (I can always just redo the memo, by "easy way" I mean not that.)