For full-featured work, the iGO NextGen programs (xxx868, xxx519, xxx974) need only these 5 lycs, the rest need to be deleted...
Spoiler: list:

T4A_Primo_AF_1707_T4A_1707_richPOI_DEM_.lyc
PAID_GPS_More_Android_Israel_1605_NextGen_TTS_VR_GP.lyc
PEARL Agency NextGen FEU@1404 (HM, BrPOI, ExtPOI, DA, AP, SP, TL, NG, PH, HNR, DEM, CAR, 3D, JVNG, AvanteqTMC, TTS) PX-8410 SD.lyc
Becker_BJE10.lyc
W4 Brazil.lyc