Well, first we need a discriminator tap - and if and when you find it, if you use UniTrunker, you'll find that's being supported much better than T4Win...in any case, you won't need to use a data slicer. UniTrunker only needs a good clean tap fed into your soundcard.
Anyway the crux of this is that evidently no one knows (yet) where to properly tap the 330. There's a couple of possible sources of information for this...
and check the Yahoo groups listed on this Wiki page - it's likely someone has already started poking around. You can also find a link to UniTrunker here...