Login commands question:

I'm sure it's simple, but I can't figure it out. How do I get something to run at login in v6? Right now, I use ed to create a file 'setprof' that contains:
stty erase[space][backspace][return]
stty nl0 cr0

Then after logging in:
sh setprof
It works, but, it is pretty clunky.

stty question:

So, I looked at stty.c and it looks like the following should work, if the terminal is sending ^H for backspace:
#define BS0     0
#define BS1     0100000

modes[]
...
        "bs0",
        BS0, BS1,

        "bs1",
        BS1, BS1,


but:
stty bs0
or
stty bs1

don't result in proper backspace handling..

but:
stty[space][^h][return]

works...

Thoughts?