[Coco] How do i save a program typed in a emulator

[Brian Palmer]

Sorry about that, that was my draft, wasn't supposed to send it, until i
described abit more about the programs I'm trying to type in.
must've pressed the send by mistake.
Here Goes, it's a basic game listing, which when runs, makes a machine lang
program.
This i'll be doing in David Keil's emulator, 
so when i finish typing it in, how do i save the program, without having to
do it to a real disk,  i want to have it saved into a DSk image, easier to
send it in a email attachment.
That way Curtis just has to get the files from a dsk image.
hope this is enough info for my problem.