I'm releasing this as requested, so please enjoy.
This is just a simple white previews preset for Content Manager that look pretty clean in my opinion. It's not one size fits all unfortunately, so for some cars you may need to adjust them horizontally a tad in order for them to fit in the...
Since I've been asked twice this week to share my preset, well, here it is!
Copy the .cmpreset file into \Users\*********\AppData\Local\AcTools Content Manager\Presets\Custom Previews (*** is your user name).