I've edited original XL2411T EDID and saved it to .inf file: changed only 4 values: "Manufacturer ID", "Model ID", "Serial number", "2nd description field"(Display Product Serial Number), "4th description field"(Display Product Name) to Asus VG278 values.
Now i have original XL2411T refresh rate timings, ability to set 144hz and ability to enable 3D in nvidia control panel at 100-120hz.
This .inf for XL2411T owners: http://ge.tt/api/1/files/6FMs6UU/0/blob?download
Also i found another trick to disable 120 fps capping when lightboost is ON. No any stuttering or tearing noticed.
1. Enable 3D (at refresh rate 120hz) via nvidia control panel.
2. Set refresh rate to 144hz via windows. Lightboost will be auto disabled.
3. Disable 3D via nvidia control panel.
4. Set refresh rate to 120hz via windows.
I hope someone will find trick to enable lightboost at 144hz. May be via DDC/CI/I2C.
Tested this all at benq XL2411T at win7 x64 with nvidia beta 310.70 and FIFA13 with FRAPS fps counter.