For ME3LE, you have to replace the texture in all instances of BioA_Nor_100Cabin and BioD_Nor_100Cabin.

For ME2LE, you have to replace the texture in both instances of BioD_Nor_000Cabin.

Before installing the texture, click 'Single Package' instead of 'Multiple Packages' this is important if you want the texture to only show in Shepard's cabin.

Find the appropriate texture by searching for 'PictureFrame01*' without quotations. Under Textures Manager you'll see several textures. note that the file needs to be either a mod file (like ones created by NMM), or archives (rar, 7zip etc) Sorry for that. in the NMM Mod page, the first button is 'Add Mod From File' click it, and then select the file you want to add.

Open ME3Tweaks Mod Manager, go to Tools, and open Mass Effect Modder. as for manually installing mods, there is a button just for that.

If you want the texture in Shepard's cabin ONLY, follow the manual instructions bellow instead with the provided. Install with ME3Tweaks Mod Manager/Mass Effect Modder like any other. Simple retexture for the photo frame in Shepard's cabin to memorialize the Normandy SR-1. Make sure the file extension is associated with MO, this should have occurred in the tutorial, but if not, click the settings button, and in the Nexus tab click 'Associate with 'Download with manager' links'.

Nexus mods how to manually