Hi,
not sure if it has been mentioned here in the forums before.
A short instruction on how to add sock’s enhanced LDR to GTKRadiants help menu:
Just add
<item name="sock's ET Level Designers Reference 1.1" url="http://www.planetquake.com/simland/ldr1_1/"/>
to the file “/Radiant-1.4/game.xlink”.