[xXxrenhoekxXx]

try putting this in their walk code
if x < view_xview + (add whatever the camera width is)
and x > view_xview
and y > view_yview
and y < view_yview + (add whatever the camera height is)
{
(all your shitty coding goes here)
}

I did this from memory

EDIT: I'm also interested in how you did the lighting
was it tiles or was it advanced lighting code?