A good irc guide for IRC is here:
http://ronin.soldats.net
Thanks to Ronin :P
For XDCC bots, what you have to do is type /msg botnick XDCC List
And you will receive a pack listing of the releases.
Afterwards, you type /msg botnick xdcc send #packnumber
#packnumber is the digit corresponding to the file you are looking for.
good luck, if you ever have any problems in A-E in particular, please drop me a private message and I'll gladly help you out.