mvs help!!!!!!!!!!

I am new to neogeo and have some curious questions. I have a 4 slot mvs and it is hooked up on a gw supergun. I want to know how to get the intro ads to work on it before the game starts. Also in the hard dip what is communication and what does it do. I have many problems with games. My metal slug 1 has some horrible crackling static sound effects and sometimes it is ok. Also glitches when things blow up. Fatal fury 1 sound effects lots of the time don't happen and there are transparent squares that some times glitch on the screen mostly in two players. The transparent squares happen in samurai showdown 1 mostly in the beginning of rounds or cutseens. Also I notice a lot of slowdown in games especially in two player mode. I have heard that neogeo has a lot of problems with glitches slowdown and bad sound even on the new games you all discuss. I don't understand why such expensive equipment is so unreliable and that the games don't even work properly on all the mvs. I am a fighting game fan and love the games but the quality of the equipment frightens me especially with the big price tags. Everything seems to be a gamble. I think I will return my 4 slot because it also resets sometimes, and get a mv-1c because it is new and maybe it will work better. I heard that it is better to use a one slot on a supergun then a 2 4 or 6 slot is this true. I also wonder if the mv-1c has dipswitches or if it is pre set. I heard someone on the forum say it was set to a standard setting. I know that most of you are very smart with this stuff and I would really be thankful if you could answer a few of my questions. It hurts when you spend so much money and get so many problems. I thought it was the other way around.