It's pretty easy to write unix format text files on your windows machine,

{
    local $\ = chr 10;
    # . . .
}
[download]

among many ways.

If the problem is to write your file directly to the unix box, the answer depends on the kind of access you have. I'd recommend ssh over telnet, and sftp is nice. NFS is possible, but less desirable IMO. sftp will translate line endings for you in ASCII mode.