First you need to check if files in the zips are all stored in the excessiveplus folder (I cannot remember at the moment and dont have those zips to check it for ya). If not, then you need to create excessiveplus subfolder under your q3 directory. Then you can extract all the files found in the zips into that excessiveplus folder. First you extract the 1.0 files and then you extract 1.01 files, overwritting the existing ones.

oh boy cid he must extract 1.01 to C:\Games\Quake III Arena\ excessiveplus otherwise he put it also in the quake directory