Because you can't insert coins to play in arcade mode, unless you have the correct BIOS. But then, if you can play with this BIOS in arcade mode, you can't select boss-characters. Hey james, I saw this on your website What emu is this? Kawaks, MAME (does not support transparencies?!), Nebula (umm....no!) ? Fake maybe? I can play kof2003 on kawaks dev and mame with no problems no speacial bios is needed. as for the pic's they are from the net that pic you show has a URL address on it.... The reason i do not recomend Kawaks DEV is that it is only a dev test emu and the roms it uses are not correct. once it works on the normal kawaks it will use the rom set like mame uses. Umm...I think you misunderstood me, james. Did you notice the transparency? I'm wondering where it comes from. Myself, I can not enable the shown transparency on Kawaks dev. It was on your website, so I thought you might know something about it. Can someone else enable transparencies on Kawaks?