How and were do i upgradee my weapons on 1st black ops zombie map?

Once you have any entrance to the main theater and the power on, there will be a giant teleporter just like in Der riese. Follow the power line back to the lobby to the strange circular platform. Link the power from there and activate the teleporter and it will bring you to the projector room where you can upgrade your current weapon for 5000 points on the pack-a-punch machine. Warning- decide what you want to upgrade first before you go because there is a time limit once you enter the room.How and were do i upgradee my weapons on 1st black ops zombie map?
each level has a weapons cache hidden somewhere in the level. Basically you have to amass a large amount of points which will let you unlock doors and elevators in the level be warned the more rooms you unlock the more zombies you have to deal with in the long run. It's damn near impossible to do this solo so i suggest that you find a team of 4 or more people to play with, that way you can assign one person to travel trough out the entire map and just unlock doors and elevators your ultimate goal in each level is to restore power and increase your chances of survival. It's a ***** but worth it in the end to restore power it makes surviving the endless zombie hoards easier. Hope i answered your questionsHow and were do i upgradee my weapons on 1st black ops zombie map?
There are chalk silhouettes on the walls. Walk up to them and it will prompt you to hold down a button to purchase the weapon.