What we need is a tool (and willing programmer) to edit cut track.
To make an AIW that works correctly you need to use an ISI AIW editor. The fast line for example can not be edited manually because "other" data is changed that affects how the AI react.
The cut track parameter is one variable that could be adjusted manually, and a simple "Cut Track" editor could do it.
Code:
wp_width=(6.375,6.200,11.375,10.769) // road left, road right, far left, far right
wp_dwidth=(25.568,10.769,0.000,0.000) // collision left, collision right, cut left, cut right
Basically you start with the "road left" and "road right" distances, then cut track points are determined by adding the length in "cut left" and "cut right". For the example above the cut track points are the same as the road left/right points.
You could try to simply search and replace ",0.000,0.000)" with ",9.999,9.999)". This idea might effectively disable the cut track as long as the corridors were generated correctly and the cut track for all the waypoints is ,0.000,0.000.