Since there is no such thing as 'awp_india.wad', I assume the textures are included in the BSP. You can extract textures from a map using a program called Textract.
1) BSP file, like awp_india.bsp
2) Textract --> http://www.superjer.com/files/textract.zip
3) Put them in the same folder
4) Open a command window there
5) Type: textract de_inferno.bsp de_inferno.wad
6) Press enter