First off the patches on this site are for the UK version of Panzer General II and they will not work with any other version.  Make sure you have a fresh installation of the game,  then simply find the downloaded patch on your hard drive for version 1.1 you'll see a file called 4099xdat and double click it.  The file for version 1.2 is called pg2_102.  After you've double clicked the file it will automatically find the pg2 exe provided its in the default installation directory,  if its not then simply direct the patch program to the pg2 exe which will be in the main pg2 directory.  Once you find it click the update button and the patch will do the rest.  I would recommend installing both patches,  1.1 followed by 1.2.  If you have any problems feel free to contact me at dean_che@hotmail.com for more help.