Hi,
In general, I'd prefer it if you do not change this file, as it includes the credits for ship modellers who have kindly allowed their models to be included, and gives information about the open source licence used in Bridge Command.
If you do change this file, you must keep the information that:
1) The program is licenced with the General Public Licence version 2
2) There is no warranty
(Please see http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html, paragraph 1)
If you do need to modify the credits file, you will need to edit the two numbers at the top of the file. The first of these is the file size in bytes, and the second is the number of lines of text.