1). Download the pitch mat patch of your choice from
http://www.planetcricket.org/.
2). Extract the .zip file to anywhere on your hard disk drive.
3). Open the BigGUI editor.
4). Open the data_pc.gob file.
5). Select the pitch mat file of your choice. (e.g. 0ce83d1bd97d73f5eed69ec9529a53f5.fsh for a dusty pitch.)
6). Use the BigGUI editor to extract that file to anywhere on your hard disk drive.
7). Open the fshEd editor.
8). Open the .fsh file you just extracted.
9). Go to the 'ptad' file inside that.
10). Use the import tool to import the pitch mat patch there.
11). Save the file.
12). Put the edited .fsh file in the Cricket 2005 root directory.
There. That's how to import pitch mats.