Rick,

A long time ago I posted a way to enter chord triplets in a 4/4 song, by e.g. changing it to half a bar of ¾ and adjusting the remainder of that bar to 2/4.

Of course just will have to adjust the speed of the song for that ¾ bar, as it must last as short as 2/4 of the regular 4/4 bar.

Good luck!
Tonnie