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Ok...here's a tracktion archive I put together that demonstrates the power of racks.
Get it here
26KB
Here is an ogg preview of the archive
497KB
It's a twelve bar ambient loop using all free plugins. There are only two midi tracks and two racks.
Links to plugins:
Mr. Ray 2.2 Patch: 20 FM EP2
Andreas Ersson's ersdrums Patch: Long Drums (if necessary, change "Note"s to 36,41,38,40,37,43,39,51,42,49)
Kjaerhus Audio's Classic Reverb Patch for 'pad' rack: 0 Default - Patch for other rack: 8 Big and Bright (i boosted the level 20% or so)
(Smart Electronix) Antti's Augur Patch: 4 Pad2
Ugo's String Theory Patch: Magic
ndcMIDINoteRangeFilter (note that this is a .zip of all the ndc MIDI filters. In this archive only the noterangefilter is used)
RGC:Audio's sfz free
Claire Fitch's Cello Soundfont
Rack Descriptions
Rack 1 (pad): This rack is the simpler of the two. Basically, you can see that the midi is split into two synthesizers. Notice that the left channel of Mr. Ray and the right channel of Augur both feed into the Classic Reverb. Also notice that the right channel of Mr. Ray and the left channel of Augur both go directly to the outputs of the rack. This creates a stereo reverb and a stereo no-reverb on each channel. If I wanted the reverb and non-reverb parts to run together (on the same channel), then I would reverse the outputs of the classic reverb.
Rack 2 (cello and percussion):
This rack is a bit complex, but don't let it intimidate you. Basically we have the midi from the midi track split into 3 parts. The first split goes into ndcMIDInoterangefilter which tells sfz not to play midi notes below #45 (all the percussion midi notes). Sfz is playing the great cello soundfont from fellow kvrian Fitch. The second midi split goes into String Theory and the audio out of string theory goes straight out of the rack (ie the rack outputs...except for the left channel which also goes to the reverb). The last midi split is a bit trickier. Here we have ersdrums which is a multi-out drum synth. The midi notes come into it (remember that sfz is denying these notes) and are translated to individual output nodes based on the note. I found some of the sounds rather soft so I routed those sounds to a compressor. The rest are run directly to the rack outputs. Notice that some of the outputs from the ersdrums go to both rack output channels and others (crash) go to only one channel. Another interesting thing to note on this rack is that the reverb is shared between all three vsti's. This allows you to have a cohesive reverb sound and use the rack architecture as a way of creating virtual sends and returns.
Your imagination and patience are the end of the road with racks. You can do a vast amount of things with them ranging from simple routing to complex modular creations.
Haven't checked your archive yet but Tracks are one of the greatest things about T and once you start using them there's no looking back. 
I'm not giving up on it, just letting it rest for a while as well. 
