  We present new results of 3-D AMR MHD simulations focusing on two distinct
aspects of PPN evolution. We first report new simulations of collimated
outflows driven entirely by magnetic fields. These Poynting flux dominated
"magnetic towers" hold promise for explaining key properties of PPN flows. Our
simulations address magnetic tower evolution and stability. We also present
results of a campaign of simulations to explore the development of accretion
disks formed via wind capture. Our result focus on the limits of disk formation
and the range of disk properties.
