Just bought a wheel bearing kit... 1 inner and 1 outer bearing(bigger one) the kit also came with 2 other bearings (smaller one... do I need to change that also... if so where is it assemble in the hub..I'm new at this.. I'm trying to fix it myself, so I can take the credit.. instead of the mechanic... any help or hint would work thank.....

I guess you are talking samurai?  If so, the smaller bearings are probably the kingpin bearings.  I wouldn't change them, if the original bearings are not rusted, pitted, damaged, etc.  Just clean up the old ones, repack them and reinstall them.  When you remove the kingpins, there are probably going to be thin metal shims between the kingpins and the knuckles (they may be stuck to either the kingpin or the knuckle, so pay attention)....be sure that you don't lose them and you put them back in where they came from.

Thank you for your help...... I've change it cause I just don't wanna have to change it in the long run..... thank you again