Hi10P on new Subnotebook

Hello,
Not so lang ago I bought a new Lenovo X121e with the following specs:

- 29,46cm (11.6") HD LED Display, matt (1366x768)
- AMD Fusion E-450 1.65GHz (1MB Cache)
- 4096 MB DDR3-RAM 1333MHz
- 320 GB SATA Festplatte 7200 U/min
- AMD Mobility Radeon HD 6320M (Shared Memory)

I tried to set it up for Hi10P Anime playback using this guide:

http://haruhichan.com/wpblog/?p=205

Right now I'm running MPC-HC, LAV Filters and EVR Custom. I tested with Fate/Zero 05 from utw, and it still slows down during some sequences. But it doesn't get out of synch, it shortly stops playing completely, than resumes.

Any idea of how I could increase the performance, making it run smooth?