Not sure which app you use:
If you are in AE another option is to simply use the split layer in AE, (CTRL-SHFT-D). Reduces in half the labor.
So you split all your layers at cut point, set AE comp settings to 24 FPS and then on the first layer you apply twixtor and you set Twixtor to 29.97 for input FPS. You copy Twixtor (select CTRL-C)
You select a layer and select all layers (CTRL-A), deselect the first one and do paste (CTRL-V). You now have a twixtor in every layer.
You then render that with 3:2 pulldown option in Render Settings (you need to set Lower or Upper Fields first otherwise 3:2 pulldown remains grey out)
Pierre
http://www.revisionfx.com