Hi Adorno,
all key management related stuff is done in the PGP Keyring applet. Right click on the lock icon in your tray and select PGPKeys. Once there select YOUR keypair, right clic and select export. The system will ask you the name of the ASCII file where to export. By default this will only export your public key. IF you want your private key in there as well(for archiving purpose I guess) just click on the "include private key" box. It's that simple. The other files you will find after a typical installation are only ceritification authorities where you can find repositories of public keys (maybe some of your friends are already there take a look, there are 6 millions of us...) Don't touch any fiels you haven't created with PGPKeys to ensure your installation keeps running smoothly.
Hope this helps...