You need to find an NSP file with a specific title ID. Doom’s base Title ID is 0100751000E82000 . The update 1.0.3 will have a different version number in its metadata. Look for file names containing:
: Resolved progression-blocking issues in Legacy of Rust and TNT: Evilution . Expanded Mod & Multiplayer Support doom nsp update 103
Depending on which title you have installed, version 1.0.3 might refer to different releases: Doom + Doom II update out now (version 1.0.3), patch notes You need to find an NSP file with a specific title ID