A high-value addition would be an integrated toggle. NSZ files are compressed versions of NSPs that save significant storage space and install faster than standard formats. Recommended Implementation Tools
Using hacpack or NSC_Builder :
For a step-by-step on combining files, you can refer to this NSP Combination Tutorial Are you looking to a specific file from a cartridge dump, or are you trying to an installation error on your device?
Specifically used for compressing NSPs into NSZ format to save space, or decompressing them back to NSP for compatibility with certain emulators and installers.