以下の英文についてお尋ねします。Haiti
Recorded on February 1st, 2010, in the same studio as the original 25 years earlier (Henson Recording Studios, formerly A&M Recording Studios) "We Are The World 25 For Haiti", in which Quincy Jones and Lionel Richie serve as executive producers and producers, was created in collaboration with executive producers Wyclef Jean, Randy Phillips and Peter Tortorici; producers Humberto Gattica and RedOne; and co-producers Rickey Minor, Mervyn Warren and Patti Austin to benefit the Haitian earthquake relief efforts and the rebuilding of Haiti.
Recorded on February 1st, 2010, in the same studio ~から分詞構文と副詞句で始まっており、SVのVはwasだと考えますが、主語はどこに当たるのでしょうか?また,
,in whichはWe Are The World 25 For Haitiに掛かる関係副詞だと考えますが、wasと動詞が来ているのにin which内が現在形( serve )なのが引っかかるのですが、最後に to benefit the Haitian ~以降の用法が掴めないのですが、できれば意訳を入れて全体を説明頂ければ幸いです。