Greetings,
I have a great deal of experience with reverse engineering Win32 applications.
I don't use all of the tools you listed as a few of them are rather dated these days. I've not seen mention of w32dasm and hiew since I used to read +Fravia's site.
My toolbox is primarily composed of Ollydbg, IDA Pro,VC++ and last but not least my mind.
My work is thorough and will be well documented. All notes, IDA databases, C/C++ code etc will be provided. Should you wish to have further changes made you can pass on these files to whoever wins that contract to give them a better starting point to work from (makes it cheaper and faster for you).
I'd like to discuss this with you further to find out more about this game you have and what sort of changes you require.
I look forward to hearing from you soon.
Kind regards,
Chris