1st thing to do is throw that easyCRAP in rubbish
they are complete junk!!
it annoys me to no end to see them plastered all over ebay
duping people into buying them.
get a ATI ,black magic or other good quality capture device.
what model is your JVC? - it will need to be a TBC equipped model to do a decent job
you will also need an external TBC like the Datavideo TBC-1000
do you want to capture lossless or Mpeg-2?
lossless AVI is going to result in HUGE file sizes
if the video will not need any editing and you dont want huge files just capture straight to Mpeg-2
use 352x480 for NTSC or 352x576 for PAL
around 4000 bitrate