Here's the setup (note: you need to mod your XL with an effects loop to make this work, but you probably already did that if you hang around here hehe)...
Cable 1: from guitar to Tonelab INPUT
Cable 2: from Tonelab insert loop SEND to XL INPUT
Cable 3: from XL effects loop SEND to Tonelab insert loop RETURN
Cable 4: from Tonelab OUTPUT to XL effects loop RETURN
To setup your "XL" patch in the Tonelab: just select a free slot, turn on the insert loop, then turn off the stompbox and amp models (unless you want to experiment with muddy gain) and save. There you have it, a dedicated patch for your XL amp models! You can use either the effects of the XL or the modulation and reverb effects of the Tonelab, OR BOTH, if you want
This setup is perfect for people who wish their Tonelabs had better high gain sounds, or for XL boys who want more grace and flexibility from their XL's. It's probably too convoluted for most people to bother with, but something to remember if you want to have a poor man's do-it-all setup.
Enjoy!

