Finally got a reply on the NME forums; someone suggested I might be able to use the font tag to do what I wanted. I’m so used to CSS, it hadn’t occured to me that the font tag could be used that way. I’m going to give it a try right now.
*try try try* I hit a bit of an issue but I managed to fix it; I didn’t realize I was setting the colour of the text after writing to the text property, overwriting the colours changed by the font tag. It looks like HaXe+NME is back on!