Hello all,
For all those who know that the Xilinx FPGA Editor exists, and maybe that it's good for something, but are reluctant to try it out (for obvious reasons): I've made a short video guide, which takes the viewer around, and also demonstrates some very useful things you can do with it. Overall, it's some 20 minutes of video (in three parts).
Link:
It's maybe not easy to follow at first glance, but since all operations are shown explicitly on screen capture, using the "pause" button, and trying it out yourself, should be pretty straightforward.
The tutorial goes through everything from opening an NCD file for editing, viewing the design down to its small details, making some changes, and finally saving the altered design for creation of a bitfile. It also shows how to create probes (or: how to touch any signal within your FPGA design with your oscilloscope probe in a minute).
Hope it turns out useful out there.
Eli