Help: How to Export/Import DDS files from/into IFF files?

Can someone give me an info or tutorial on how to export/import DDS files from/into IFF files without using NBA 2k explorer.
Any help will be deeply appreciated. Thank you in advance.

Just export with 7zip, and import with 7zip using these settings:

Just export with 7zip, and import with 7zip using these settings:

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Thank u sir...