Designing a Batch based text editor

[Jack.EXE]

Here's what I got so far:

@[member=Echo] offset /p name=filename:clscopy con %name%if exist %name% copy %name% + con

Though this script has an advantage in that it automatically saves on each enter press,

What I want to add is:

Load an existing txt file

Ability to switch lines (up and down)