You can do it, there's two methods I know of. This is one is pretty easy to do but keep a backup of your original real NAND as you will effectively have a EUR sysnand and eShop will not work - even on emunand. Once you have that done just use PBT-CFW, install whatever CIA games you want redump the nand and FINALLY load it with rxTools and update. You can keep your USA/JPN/whatever CFW on a separate SD card and still use that for whatever reasons.
Load PBT CFW and install Dev Menu
Install ALL the EUR cias that come with the region switch package to your sysnand (find this on a pirate site - search
[TUTORIAL] [NO GW] How to region change Palantines CFW
Dump your sysnand
Inject said nand to your emunand partiton
Get your xorpadfat16
Inject SecureInfo_A
Test first, or if you know you did it right, install it to your sysnand using Gateway launcher (hold up on the directional pad and press a on the "downgrade console" tile)
Profit.