yeah its really hard to get right. i've done it once but it wasnt %100 perfect. i was able to get away with it thought. all i did was just carefully pull apart the buttom folds of the cellophane. try not to tear anything while doing this.
then open it up and carefully pull out the deck. . .CAREFULLY
sliding the deck back in was the harest part my only advice is to just slide the cellophane back on carefully. you can use the a paper clip to help guide the cellophane around the corners of the deck. just bend the paper clip into an L shape.
then just use what ever adheasive you like when you seal the buttom up. it can be double sticky tape, glue, duct tape,
like i said i've only done this once and i did get away with it. after i put the cellophane back on i had a little problem with it being alittle loose but the spectator didnt notice it. i even let her examine it before i opened it for her.
too much work and hassle for one time use for me to be honest. thats why i only did it once.
you can try doing this from the top but at the time when i did this, the buttom was easier to open. now thinking about it it might be easier if you do it from the top what way you can slide the deck out just enough to open it without takeing the whole cellophane off. just an i dea
hope this helps if anybody else has anything else to add on feel free
-Kyle