use plailect guide and keep your gatewayYikes, clear as mud guys
I thought I was confused going in, now I'm even more lost.
basically this post down here has it all
With a bit further reading, I realised that I should have followed the Plailect guide and installed the stock A9LH and NOT the one installed with the Gateway fast boot. I therefore reflashed my DS back to original firmware using the link I supplied above, and then followed the Plailect guide. I haven't looked back since. I now run LumaDS CFW, and can also run Gateway by holding dpad down button on boot (it's called chain loading, and is part of the CFW).
seriously, nothing to lose to use both
you can CHOOSE to use .cia or stick with .3ds if that your thing
when you feel like migrating all your games and saves, you can CHOOSE to do that or stick with the one you already have