Adding ladders via the .bsp in notepad.exe

[BuLLeT FoDDeR]

Hi, I've been editing some existing maps in notepad.exe to do things like switch to British weapons, move flags, move spawn points. I was curious if anyone had any insight on how to add something like a ladder to an existing map or a model that can block/you can jump on. I'm not talking about decompiling the map and changing it that way. I just want to do this stuff in a text editor. Please help if you know how to do this if this is even possible. Thanks.