Random movement kirupa tutorial

hi, i have found this tutorial
http://www.kirupa.com/developer/mx/random_motionMX.htm
and am wondering how to change the speed of the movement (change to a slower speed). also, how would i change “where” the movement is happening without enlarging the size of the movie clip? right now it is set at coordinates (0,0) but i would like to position it somewheres else.

i believe i just figured out the speed, just need the position help.