讨论一个现在分词的语法问题Booking the banquet hall of Beijing’s most famo

讨论一个现在分词的语法问题
Booking the banquet hall of Beijing’s most famous five-star hotel,cramming it full of the cream of the IT world and a gaggle of journalists from 170 news agencies,there was a buzz in the air about an important announcement on April 12
这里的现在分词是做时间状语吗?他的逻辑主语是什么?(因为主句是个there be 结构,所以有点困惑)
出处：
You have to hand it to Google; it knows how to make a big splash.When the doyen of search engines came to town to reinvent itself,no expense was spared.Booking the banquet hall of Beijing’s most famous five-star hotel,cramming it full of the cream of the IT world and a gaggle of journalists from 170 news agencies,there was a buzz in the air about an important announcement on April 12.