I have tried about 500000 times to geo merge with open boxes. i used both the door and the other technique. I even put immovable objects around it.... help would be very nice.
Er, what exactly is your problem? You're very nonspecific. I know that after a certain amount of door presses the box starts to sink into the floor... That can be tricky. I believe the solution to that problem is to hold the box, save and quit.
A quick and easy guide: 1. place open box in desired location 2. place immovable objects around all four sides of the box as tightly as possible to prevent uneveness 3. place door on top of open box (as close to the center as possible) 4. quickly grab and let go of the open box and wait for it to stop moving before deleting/picking up the door 5. repeat previous 2 steps to sink box lower if necessary 6. delete door and surrounding objects to complete the process No saving/quitting or playing with respawn times necessary (which actually makes this sometimes less of a pain in the ass than interlocking).