Installing NSP files via custom firmware is a violation of Nintendo’s Terms of Service. If a console connects to the internet with modified software or "pirated" NSPs, Nintendo will likely issue a permanent hardware ban, preventing any future online play or eShop access.
refers to a compressed update package for the Nintendo Switch version of Dark Souls: Remastered DARK SOULS REMASTERED -NSP--Update 1.0.3- -2-.rar