The talks were brokered by the billionaire founder of major Apple supplier Foxconn (2317.TW), Terry Gou, who is running as an independent candidate.
In one of the most dramatic moments, the KMT's presidential candidate, Hou Yu-ih, read a private text message from TPP candidate Ko Wen-je in which Ko said Gou needed to "find a reason" to drop out of the presidential race.
Hou and Ko will on Friday morning go to the election commission to register their separate presidential runs, ahead of a 0930GMT registration deadline.
Gou, who has trailed far behind in the polls, has not said whether he will also register.
By contrast, a united DPP has been charging ahead in its election campaign, registering its presidential and vice presidential candidates on Tuesday.
Persons:
Terry Gou, Ma Ying, Hou Yu, Eric Chu, Ko Wen, Ko, Hou, Gou, Lai Ching, Lai, Ben Blanchard, Roger Tung, Lincoln, Gerry Doyle
Organizations:
Taiwan People's Party, ih, Kuomintang, KMT, Democratic Progressive Party, Apple, Thomson
Locations:
Taiwan, TAIPEI, China