See also Katzman's article in Yeshurun IV, pp. 648-82 on the topic. It is on Hebrewbooks here http://hebrewbooks.org/20308
The actual "שו"ת" of "הרב ר' מנחם נ"י דליובאוויטש" who of course strenuously opposed this project, can be found here beginning at the bottom of the page; the autograph can be viewed here at the middle of the page.
Parenthetically, that letter constitutes a fascinating exposition on traditional Jewish chinuch.