By Brendan Sasso - 11/05/12 03:48 PM EST
Two other members of the group have also pleaded guilty and will be sentenced in the coming months.
Prosecutors said IMAGiNE sought to become the premier group for releasing online copies of movies that were still in theaters.
According to court documents, Lambert and Lovelady went to theaters and recorded the audio of the films. Those audio tracks were combined with illegally obtained video files to create the full movie, which was then loaded online.