The lightmapsamples.zip file you have requested: Tools / Utilities / BF2 Editor Lightmap Samples - 710.81mb is not available. Perhaps try browsing all files for the game Battlefield 2 and upload any files you want to share or are missing. This is the only information we could locate:
For those of you wanting to generate lightmaps for maps using the retail version of Battlefield 2 objects, you will need the LightmapSamples.zip file (provided here). Just unzip and read the ReadMe contained inside for placement instructions. Note: this file is 700MB in size and you do not need it for anything other than generating shadows on the retail version of Battlefield 2 objects. Even without this file, you will still get terrain shadows from all objects in your scene.