para poder jogar essas roms no gngeo, acrescente isso no final do seu romrc:

corte aqui**************************************************************

game rotd MVS "Rage of the dragons (decrypted)"
SM1 0x20000
rotd_m1.rom 0x0 0x8000 NORM
END
SFIX 0x20000
rotd_s1.rom 0x0 0x20000 NORM
END
CPU 0x1000000
rotd_p1.rom 0x0 0x400000 NORM
rotd_p2.rom 0x400000 0x400000 NORM
END
SOUND1 0x1000000
rotd_v1.rom 0x0 0x400000 NORM
rotd_v2.rom 0x400000 0x400000 NORM
rotd_v3.rom 0x800000 0x400000 NORM
rotd_v4.rom 0xc00000 0x400000 NORM
END
GFX 0x4000000
rotd_c1.rom 0x0 0x800000 ALTERNATE
rotd_c2.rom 0x1 0x800000 ALTERNATE
rotd_c3.rom 0x1000000 0x800000 ALTERNATE
rotd_c4.rom 0x1000001 0x800000 ALTERNATE
rotd_c5.rom 0x2000000 0x800000 ALTERNATE
rotd_c6.rom 0x2000001 0x800000 ALTERNATE
rotd_c7.rom 0x3000000 0x800000 ALTERNATE
rotd_c8.rom 0x3000001 0x800000 ALTERNATE
END
END

game pim MVS "Power Instinct - Matrimelee"
SFIX 0x20000
pim_s1.rom 0x0 0x20000 NORM
END
SM1 0x40000
pim_m1.rom 0x0 0x20000 NORM
END
SOUND1 0x1000000
pim_v1.rom 0x0 0x400000 NORM
pim_v2.rom 0x400000 0x400000 NORM
pim_v3.rom 0x800000 0x400000 NORM
pim_v4.rom 0xc00000 0x400000 NORM
END
CPU 0x500000
pim_p1.rom 0x0 0x100000 NORM
pim_p2.rom 0x100000 0x400000 NORM
END
GFX 0x4000000
pim_c1.rom 0x0 0x800000 ALTERNATE
pim_c2.rom 0x1 0x800000 ALTERNATE
pim_c3.rom 0x1000000 0x800000 ALTERNATE
pim_c4.rom 0x1000001 0x800000 ALTERNATE
pim_c5.rom 0x2000000 0x800000 ALTERNATE
pim_c6.rom 0x2000001 0x800000 ALTERNATE
pim_c7.rom 0x3000000 0x800000 ALTERNATE
pim_c8.rom 0x3000001 0x800000 ALTERNATE
END
END

game svcplus MVS "SNK vs Capcom - SVC Chaos"
SFIX 0x20000
svc_s1.rom 0x0 0x20000 NORM
END
SM1 0x40000
svc-m1.rom 0x0 0x40000 NORM
END
SOUND1 0x1000000
svc-v1.rom 0x0 0x400000 NORM
svc-v2.rom 0x400000 0x400000 NORM
svc-v3.rom 0x800000 0x400000 NORM
svc-v4.rom 0xc00000 0x400000 NORM
END
CPU 0x600000
svc_p1.rom 0x0 0x600000 NORM
END
GFX 0x4000000
svc_c1.rom 0x0000000 0x800000 ALTERNATE
svc_c2.rom 0x0000001 0x800000 ALTERNATE
svc_c3.rom 0x1000000 0x800000 ALTERNATE
svc_c4.rom 0x1000001 0x800000 ALTERNATE
svc_c5.rom 0x2000000 0x800000 ALTERNATE
svc_c6.rom 0x2000001 0x800000 ALTERNATE
svc_c7.rom 0x3000000 0x800000 ALTERNATE
svc_c8.rom 0x3000001 0x800000 ALTERNATE
END
END 

game kof2k2 MVS "The King of Fighter 2002"
SFIX 0x20000
kof2k2_s1.rom 0x0 0x20000 NORM
END
SM1 0x40000
kof2k2_m1.rom 0x0 0x40000 NORM
END
SOUND1 0x1000000
kof2k2_v1.rom 0x0 0x400000 NORM
kof2k2_v2.rom 0x400000 0x400000 NORM
kof2k2_v3.rom 0x800000 0x400000 NORM
kof2k2_v4.rom 0xc00000 0x400000 NORM
END
CPU 0x500000
kof2k2_p1.rom 0x0 0x100000 NORM
kof2k2_p2.rom 0x100000 0x400000 NORM
END
GFX 0x4000000
kof2k2_c1.rom 0x0000000 0x800000 ALTERNATE
kof2k2_c2.rom 0x0000001 0x800000 ALTERNATE
kof2k2_c3.rom 0x1000000 0x800000 ALTERNATE
kof2k2_c4.rom 0x1000001 0x800000 ALTERNATE
kof2k2_c5.rom 0x2000000 0x800000 ALTERNATE
kof2k2_c6.rom 0x2000001 0x800000 ALTERNATE
kof2k2_c7.rom 0x3000000 0x800000 ALTERNATE
kof2k2_c8.rom 0x3000001 0x800000 ALTERNATE
END
END
 
corte aqui****************************************************************


Obs1: deixe sempre o espaço de uma linha entre os rcs, inclusive no final do arquivo, onde deve constar uma linha em branco!

Obs2: observe a sintaxe do romc ( exemplo: King of fighters 2002 ):

game kof2k2 MVS "The King of Fighter 2002"
SFIX 0x20000
kof2k2_s1.rom 0x0 0x20000 NORM
END
SM1 0x40000
kof2k2_m1.rom 0x0 0x40000 NORM
END
SOUND1 0x1000000
kof2k2_v1.rom 0x0 0x400000 NORM
kof2k2_v2.rom 0x400000 0x400000 NORM
kof2k2_v3.rom 0x800000 0x400000 NORM
kof2k2_v4.rom 0xc00000 0x400000 NORM
....

Depois de game temos kof2k2 , então sua rom necessariamente deverá chamar-se kof2k2.zip; dpois, mais abaixo há uma série de nomes de arquivos ( kof2k2_v1.rom, kof2k2_v2.rom... etc ), observe se dentro do arquivo zip da sua rom constam estes arquivos com os mesmos nomes, pois as vezes é preciso mudar o nome dos arquivos para que sejam coincidentes entre si (romc vs kof2k2.zip), na propria rom ou no romrc (recomendável).

Esse exemplo também é válido pra qualquer outra rom... Boa jogatina!