How do I put GET / PUT commands in a file and use that with CoreFTP instead of using a site?

EG:
instead of:
coreftp -site mysite -u c:\myfile.txt -p /remote/myfile.txt
i want to do something like: --
coreftp -myscript.txt
myscript.txt contains:
OPEN ftp://username@password:ftp_location
PUT file.txt
EXIT