These are many maps from HW1, converted to HW2. In .BIG format.
Quote Tefeari:
The goal of this project is to bring the rich collection of fan-made maps from Homeworld 1 to Homeworld 2. So far over 170 maps have been converted, 133 are included as working maps in the current release. Version 2.0 now allows the map pack to be compatible with ANY Homeworld 2 mod.

INSTALLATION:
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1. Extract zip file to your \Homeworld 2\Data\ Folder
2. Your Done!