"An application manifest is a self-generated certificate. You create it by supplying a plaintext manifest configuration file to the Genmanifest.exe program included with the SDK."
First, I created a manifest configuration file (.mcf) that contains content like the following:
"C:\\Program Files\\Microsoft SDKs\\Windows\\v6.0\\Bin\\isvtier5appsigningprivkey.dat"
REQ HASH "C:\\development\\firstapp.exe"
REQ NOHASH "C:\\Windows\\system32\\msdrm.dll"
PUBLICKEY "C:\\Program Files\\Microsoft SDKs\\Windows\\v6.0\\Bin\\isvtier5appsigningpubkey.dat"
Once I had this .mcf file created, I ran the genmanifest utility, passing in the name of my .mcf file, with the following command: genmanifest -chain isvtier5appsignsdk_client.xml genman_config.mcf manifest_out.xml
It didn't work the first time (I can't remember the exact error at the moment). I figured this was because I had not created "firstapp.exe" mentioned in the .mcf. This indeed was the case. When I changed the .exe name to an existing .exe on my machine, it worked. So, just a tip - create the .exe before you create the manifest. I probably should have known this, but hey, I'm a newbie.