Watch the Drop 2, 3, 4 Voicings online guitar lesson by Brad Carlton from Guitar Lab: The Golden Arp
There is only one voicing of the drop 2, 3, 4 add 9 chord in 1st inversion and boy is it a tough one! From low to high it is voiced 9(2), 3, 5, 1 and it uses strings 6, 5, 4 and 1. It not only requires big stretches along the string axis, but the extreme stretch up to the 1st string with your 3rd finger is radical. You'll have to have very short fingernails and limber fingers. Seriously, don't hurt yourself with this one.