Call Conference Recording

I am new to Asterisk.

I would like to do a couple things …

I would like to record all conferences for my 6001 bridge.

I would like them to be recorded to /Recordings/meetme.

I would also like them to be recorded as mp3.

I am again very new I am a gui user but Will need to edit the files directly I am sure … No problem I can do that.

I just need to know what to edit and what to do exactly. if I am creating a new marco or just adding heading.

Thank you.