after some struggling, i found the way to get the hud working in tekagis!
just download jflp patch and install it in a separate directory from freelancer, then take the interface ad cameras.ini from the folder and copy them in your freelancer\data folder
then take dacom.ini, freelancer.ini, hudshift.dll and copy them to your freelancer\exe folder.
you're set, enjoy widescreen tekagis!