channel would be simple, $chan.
pack #, usually starts with # or is a 2 digit number, loop and find one.
record speed isnt always there, but search for a kb/k since it would require that to be in the sentence to make sense.
bot name would be $nick (on text)
size, would be mb/kb/k search for those in the sentence.
You will however need to find someway to differenciate between file size and record speed, I would guess common sense would say the filesize would always be before record speed.
Eamonn.