Sure!
To use MorphMaker (
http://www.modthesims.info/download.php?t=613061)
Run MM and go to the "Create/Edit Slider and/or Preset Package" tab,
Go to the "Add/Edit CAS Presets" tab,
Click the "Clone CAS Presets" button,
A big long list will pop up. You'll probably have to make the window bigger to see the selection boxes on the right-hand side.
Click on the Region column header at the top of the listing to sort by region,
Scroll through the Body presets and check the select box for the ones you want. Some have names but you'll have to guess at others. Look at the species; you won't want the dog and cat presets. Look in the AgeGender column, it gives the ages (P for toddler, C for child, T for teen, Y for young adult, A for adult, E for elder) and the gender (M, F, or U for unisex). The frame column gives the frame gender. I'm not sure about the toddler presets - none of them seem to have body modifiers but there are toddler body presets in the game so I'm not sure if they work differently or what.
Once you've checked all the presets you want, look down at the bottom of the window, select the Default Replacement option, and click Clone Selected,
You'll now see a list of presets on the left, and in the upper right is the button to Set Preset Thumbnail. Click it for each one and you can replace the image.
When done with each one, click Save Preset.
When done with everything (or needing a break), save the package.
Last, you should use s4pe to remove the preset resources:
Open the package with s4pe,
Select all the entries with tag CPRE, right-click, and click Deleted,
Save the package.
You don't really NEED to remove the preset (CPRE) resources but if you ever download a mod that replaces EA presets they'll conflict with it. If you intend to upload this you definitely should remove them.
Both methods are kind of tedious. I can't really recommend one or the other, just depends on which tool you feel more comfortable with.
Please do not PM me with mod, tutorial, or general modding questions or problems; post them in the thread for the mod or tutorial or post them in the appropriate forum.
Visit my blogs for other Sims content:
Online Sims - general mods for Sims 3
Offline Sims - adult mods for Sims 3 and Sims 4