Did you check if your ROM is set to 'read only' in it's properties? This will prevent the program from saving any changes you make. Uncheck the box if this is the case and try again.
Thanks:D
Not that I know of. In all my time hacking I don't believe I have even come across any documentation on the layout of data in the save file:\
Your best bet is to search Google for 'layout of save data in Pokémon Gold' or something along those lines.
First off, there are several map editors for G/S/C, GoldMap being the most popular, you can download it on my site, (link in sig), there are however others the first that comes to mind is UltraMap, although I am unsure as to where you would find a link...
As for a Pokémon editor, try Yomama, the famed metallic generation hacker's tool:P, PokéEdit GSC. Either go to his toolbox, or download it from my site.:laugh:
I live in Northamptonshire, the same county as Silverstone:D
I assume you mean to edit the appearance of the trainer. I beleive that AGIXP (sp?) can help you, although I have never used it. It edits the Pokémon graphics, so you should be able to edit the trainers with it, although I am unsure.
Thanks, although I probably know less than you would think...;)