VGA 16 colours 640x480 incompatible with new graphic adapters

Hi friends,

After upgrading several PC's in our network with an ATI Rage pro graphic
adapter
our main app, which is made with BC 4.52, crashes on all these machines.

We've found out that the new graphic cards doesn't seem to support the 16
colour
mode any longer. We fear, that probably more and more manufacturers could
give up this mode.

Are there any updated bgi-files available to solve the problem, or is there
any other
solution ?

Thanks
Reiner