[vdr] speeding up vdr+xine on an old Pentium4

Hi, I´ve taken an old PC (Intel graphics card on board, P4@553Mhz, 512Megs of RAM) and installed mms, vdr and lirc basically.

Everthing works fine but I see cpu utilization in the region of 90% (this is with SD, I have no delusions about HD channels on this hardware)

At the moment it is connected to a monitor, so I have a feeling it goes for the maximum resolution. Eventually it will be connected to an old 28 inches TV (CRT not LCD) with an adaptor VGA to RCA

Any tips on how I could speed things up? Xine settings? Xorg settings? vdr settings? xv or opengl?