enable
show running-config
(copy output to text-file)
or
copy running-config t
ftp://<ip-address/mybacku
p.txt
If you want to automize your backups, have a look at Kiwi CatTools that can do hourl/daily/whatever backups of all your gears configurations.
And dont remember to do "wr mem" every now and then, or you will loose your changes when power-cycle the gear.
/Kvistofta