elgg and drupal 6.10

hello ,

i am developing a social networking site with drupal but recently i came t know bout elgg and its huge potential. i also read that it can be installed in drupal. will it be able to support my idea on a stand alone basis or will i have to install it in drupal.

 

for both ways what are the ways and books that can get me started with elgg.

also how can it be installen in drupal.

pls suggest some good stuff to read bout it more.

 

thank you