OK.  The easiest way to do this is as follows: (Make sure you save your project before trying this)

1.  Select the modified garment with all of your morphs (ones created with the morphing tool, and others with parameter dials). Make sure ALL of the morphs you want to combine together are set as you need. 

2.  Choose Figure > Spawn Full Body Morph.  You'll be asked to enter a name for the morph.  Example:  Dress for Dawn 2

3.  With the outfit still selected, choose Figure > Zero Figure. This zeroes out all of the morphs you dialed in.

4. Now Dial in ONLY the "Dress for Dawn 2" morph that you spawned. You should see exactly the same thing you saw when you had the morphs individually set.  DO NOT delete this from the scene. You'll need it for the next step.

NOW ... Here's the key.  You need to create a new DEFAULT SHAPE for your clothing, and the vertex order has to be the exact same result as the original OBJ file for LF2, otherwise the morph won't work properly.  To do this part:

1. Import the OBJ file (not the CR2) for the garmet you modified.  Typically located in Geometries folders. So let's say your original OBJ file is named Dress for LF2.OBJ. 

2. Select Dress for LF2.OBJ (substituting with your OBJ name, which will be listed under the Props category)

3. Choose Object > Copy Morphs From. Expand the menu to select the Dress for Dawn 2 CR2 that is in your scene (it's generally the choice at the bottom of the selector list). Then choose OK.

4. Click the Select None button at the bottom of the dialog. Then select ONLY the Dress for Dawn 2 item in the BODY actor.  That will automatically check all of the various body parts included in that BODY morph.

After you create the morph, go to the BODY actor and dial the morph to 1.  

Now you can export THAT OBJ and name it whatever you want to name the clothing object for the Dawn 2 dress. Note though that Dawn 2 has an extra abdomen2 body part that LF2 doesn't have so you may need to do some manual regrouping.

If you need more help let me know.