In My Sims Agents, to synthesize a mailbox, you need to gather specific materials from your environment and complete missions. Once you have the required items, head to the crafting station and select the mailbox from the list of available items to create it. Make sure you have enough resources to complete the synthesis. After crafting, you can place the mailbox in your area to receive messages and connect with other characters.
I don't think you can
you can only open a mailbox if there is something in it. however, if there is then I can't help you with that
If you are talking about My Sims agents DS then she is in the east village and here house is opposite the Tailor's.
In Little Lea Lake in My Sims Agents the answer to the door before thief v can get it is 50
Don't think you can, sorry.
it should be in the front of the house next to the trashcan.
My Sims Agents Questions-Where is the helicopter? the helicopter is at you head quarters and is on the very top floor
did you delete the mailbox? if you delete the mailbox on that particular lot, none of the sims will be able to interact with the visitors. as far as i know, if you've already deleted the mailbox, that lot is pretty much screwed. move your family out of that lot and into a new one and this time just deal with the bills. but this is only if you're playing the first sims; i couldn't tell you why if it the second or third sims.
how do you fix the bike in my sims agents
I find My Sims Agents wii is better, but it doesn't take very long to beat.
You cant, buy a computer
I haven't seen her on mysims agents at all. Sorry