which type should I use on garmin 3750?

which type should I use on garmin 3750?
Does this map include LATAR Expressway?
Thanks. I was thinking using "IMG JCVlarge 260MB" since garmin 3750 do not use 3D-Building.
2575R will be the same as 1460 as they have the same resolution screens (and same size also).
For some reason type3 fails to unlock on my 1460 using unlocker 1.5 for the code in gmapprom.unl file. Since there is no gmapprom1.img file I assume it fails to unlock because both SgMyNav, SgMyMal and SgMyTA must both be upgraded together?
nuvi 1460 2.70 software SingMal MSM ChinaHK 7.61 Europe 2011.30 AusNZ2010.30 NAmerica2011.10a
instructions in post 13
You have to navigate to get to the good.
Galaxy S5 Kitkat 4.4.2 / Nuvi1200->1250 / Nuvi3790T->34xx / Nuvi 2200 / Nuvi 66 / Oregon 600
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