To put the pitch ad into the game you need to extract the fsh file of the pitch type you want to put it in e.g. england (hard) which would be in your data_pc.gob and then open this file using fshed.
Then go to ptad and click on object - import. Then click on new and open up the bmp pitch ad you just downloaded then click update and save it. Then put the fsh file into the main directory.
If you dont understand then there is a sticky in the cricket 2005 download forum which explains it step by step.