how?

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If you're trying to use Generals speech in a Zero Hour map, this might help:

http://www.cnclabs.com/forums/cnc_postst16894_I-found-a-way-to-use-the-Original-Generals-speech-on-Zero-Hour-missions.aspx 

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This will help, Want To Get The "Preview Sound" Button Working? 
Extract the Original Generals sounds or whatever you need (not everything like in the guide) into the zero hour sounds folder the way it's specified in the tutorial, then use the .ini files to add the sounds to Zero hour if they aren't there already.
Btw, if you extract a sound effect from Vanilla Generals that was modified in Zero Hour and put it in Zero hour's folders, the game will use the ones from Vanilla.

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EDIT: This way changes it for the whole zero hour, but if you want it for maps, Skymix's way is better and easier.

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Thanks guys

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