DAL191 wrote on Oct 24^th, 2013 at 1:04pm:

Forget all the calculations concerning center of gravity because the CS752 is not sophisticated enough to recognize any changes. Just use 30 all the time and you will be alright. Michael Cubine

The CS-B752 follows the rules that FSX has defined. If you never change your passenger count, cargo weight or destination, you always end up with the same CG, thus the same everything always.

As a test, change your cargo to the front cargo bays only. Input '30' in the FMS for your CG, set your trim units as suggested. When you rotate, the aircraft will require more stick back and feel sluggish and less responsive.
Setting '30' as Micahael has suggested, will not always work.

I have investigated the CG and weights for 2 months now. I understand more now than I ever though I would.

I have created an Excel spreadsheet that will show CG as well as fuel requirements for the B752.

Don't under estimate this aircraft! It is actually works as it should!