Adobe After Effects Template Modification Experienced AE Users

I require an experienced AE user to modify a template to my requirements.
I purchased this template because it stated that my requirements (placeholders) could be looped. However, it is beyond my capabilities. I need it modifying to fit my needs. I need to remove all material before 41.5 seconds and then looping the placeholders (the tablet pics) to enable me to add 12 placeholders rather than the 6 provided in the template. the audio should also be moved to start around the 34 secs mark to mix in with the video. The end template will be about 29 secs. Im willing to work with you and adopt my requirements to fit what is capable so if Im told that only 11 or 13 place holders is possible to fit i can work with that. The important thing is that the end product fits well. PLEASE LOOK AT THE ATTACHED VIDEO!