Did he also meet with the Trilateral Commission?
No word on the Trilateral Commission that I believe you are referring to, however Iran, Afghanistan, and Tajikistan set to establish joint commission - Ahmadinejad
Iran-President-Trilateral Commission
Iran's President Ahmadinejad said here on Wednesday evening that Iran, Afghanistan and Tajikistan will soon establish a cultural cooperation commission.
Speaking to reporters at Tehran's Mehrabad International Airport upon his arrival from Turkmenistan and Tajikistan visit, Ahmadinejad said, "Heads of the commission will be cabinet ministers from the three countries and it will be convened twice annually at ministerial, and once at summit level.
He added, the first meeting of the commission will be convened within the next two months in Kabul.
The president described the trilateral meeting of the three presidents in Dushanbe as "an important part of his trip" and said that the three countries have plenty of cultural commonalties.
He added that Iran has common borders with Afghanistan and Afghanistan has a common borders with Tajikistan, and therefore a large volume of the three countries' business transactions and transportations can take place through the Afghan soil.
Ahmadinejad said, there is plenty of ground for cooperation among the three countries, especially in the fields of transportation and energy and in that regard, during the Dushanbe trilateral Summit six cooperation documents were signed.
Concerning his 2-day visit to Turkmenistan, the IRI President said, "six cooperation documents in the fields of economics and culture were signed during these two days."
Opening Iran's Trade and Industry Exhibition in Ashkhabad and inaugurating the Bajgiran Border Terminal were among the Iranian president's activities during his Turkmenistan visit.