You should really have started writing your choices.txt at least during development, while you were making those choices.
AFAIK there's no fixed format to follow. If there had been it'd have been documented as a MUST requirement in your assignment text after all. Just make sure your user documentation is feature complete and can be understood by non-technical people (end users) and your choices.txt is complete (documents everything) and can be understood by English speaking natives. Both should of course be set in syntactically and gramatically correct English.
Joined: Jul 15, 2006
Actually i used to write notes while developing the project.I meant by my question is a standard way of organizing and presenting these data as in real world projects.