I figured out a way for my less then optimal PC to serve up play on with out constant stuttering. If I start the server in user mode and then set the priority to high thru the task manager, my videos play smoothly. Could you add options to play on settings to start the service in high priority?

You could download and install Process Explorer. It allows you to set the priority on running processes including services such as MediaMallServer.exe.
Also check out this thread:
http://www.themediamall.com/forum/feedback/general-inquiries-amp-discuss...
Another program is linked.
Server OS: Windows Vista 32-bit
CPU: AMD Athlon 64 X2 5000+ (Dual Core) RAM: 2gb
Connection: Wired DNLA Devices: XBox360, PS3, Wii
PlayOn Version: 2.59.3577