I have a V4 PS2 and it's hard to read the DVD-R backup, I have already changed the lens~~ then I still cant not boot the disc which i burned.. I have already burn the disc with 1X 2X 4X speed , but still cant load, is that my PS2 have a problem or my chip in my PS2 is gonna broke up?? cuz that's the used ps2 from my friend, then I dont wanna throw it away, is it the mod chip is better than swap magic disc???? but my cousin's disc that he burned that I can boot in and play it.. but my disces just only use swap magic CD disc to load a bigger TOC game then can play it~~~can someone tell me what the heck is that mean??