I also modded up a version of the windows UI mame32 to include the skip_disclaimer and skip_warnings options in the general options dialog box, making it easier to get to rather than having to edit the mame32.ini ever time you change the options.
PM me with an email address to send it to if you want it. Remember, 11MB+ attachment, be sure your email and bandwitdh can handle it!
EDIT: Be sure if you ask for either mame or mame32 to let me know if you want an processor specific optimized build or just the standard build.