After downloading that file you will need to open it up in a Plain Text editor. You can right click on the downloaded file and use the OPEN WITH feature and select a program like Word, Notepad, C++ editor, etc. You will see the contents of that file look similar to the following and you will need this later:\
\
-----BEGIN CERTIFICATE-----
REALLYLONGSTRING-THATDOESNTMAKESENSE THISISTHESCERTIFICATEORPASSWORDYOUWIL LNEEDTOCOPYANDPASTEINTOSAT
\-----END CERTIFICATE-----