First of all, don't use MAME32 with MAMEWAH. If you are trying to use MAME32 configs with commandline MAME I don't think this works either.
Use Windows commandline MAME to create an ini file: 'mame -cc' at a command prompt. Adjust these settings for what you want for ALL games...but then if you require specific changes for other games create new INI files named with the romnames: eg '1942.INI'. Either copy MAME.INI's contents to 1942.INI and adjust the settings required, or simply type the settings to be changed into a blank 1942.INI.
I know that's a bit rushed and probably doesn't make sense, so check here:
http://www.mameworld.net/easyemu/Beware some sections of this site refer to commandline MAME as Win32 MAME, which is NOT the same a MAME32.
Oh yeah, you can set the skip_disclaimer and whatever else in MAME.INI.
Good luck...