What files do I have to install on the nuvi 1490,

1 will it take the Full image
2 can I install the unlocked image
3 where do I install it? on the map folder of the sdcard?
4 where do I install the JCV? which one do I use?
D2665040A_JCV.rar Nuvi 12xx ( 216Mb )
D3084020A_JCV.zip Nuvi 7x5 ( 265Mb )

5 The GMAP3D is not compatible correct? If it is where do I install the GMAP3D.IMG? can I use the UnLocked CNEUNT201220_3DUL.zip

6 the G2S is the traffic trends correct? where do I install it?
7 what is the .db: D233000.db.zip file, is it compatible, where do I install it?
8 what is ASR-SRX ASR-SRX.zip ASR-SRX.z01 file? is it compatible, where do I install it?

thks