Really? The Gngeo2x wiki that everybody has referred to in the past clearly states you need to use aes-bios.bin, vs-bios.rom, usa_2slt.bin, asia-s3.rom, sp-s2.sp1, sfix.sfx and 000-lo.lo and it makes no mention of unibios.
Although it does go on to say that you only need vs, usa, asia and sp if...