There should be no need for VSFilter if you are already using ffdshow. the included vobsub works fine. Nice to see that you got it working tho.
Also, dont be like me and have both vobsubs and text file subs in the same folder.. it WILL load both and superimpose them :)
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MCE 2005, AMD 64 3500+, Epox 9NDA3J NForceUltra3, GeForce 6600 256MB, 1GB DDR400, 300GB UDMA133 HDD, USB PVR2 w/ Directv RCA DRD490RE, Nvidia 8.1, nforce Gbit, 46" EDTV Plasma, Onkyo HT-R420 650W Surround, RF Keyboard/Mouse, DVD-+RW
Modded XBOX w 200GB HDD & XBMC
MCE 2005, P4 2.8Ghz Dimension 4600C, Geforce 6200 128MB, 1Gb DDR 333, 300GB UDMA 133, Hauppauge PVR150MCE W/ Hughes D1 STB