you have a very kind friend! he told you correctly too...just left out a few details. but you already have a huge head-start on most by having mature female clones and with you already having a greenthumb, it should be a breeze...

for more info:
http://www.overgrow.com/growfaq/

and feel free to ask here too. grow help can also be found at www.marihemp.com boards (also our sister site)

any chance of some of those clones going into the ground outside?