Downloading my own apps

I am experimenting with writing small programs for the Nokia 3100. I am
using a program I found on line (Mobile BASIC).

First problem was the DKU-5 cable. I made the mistake of buying a knockoff
and, after screwing around with it for far too long, am giving up. I may
just bite the bullet and buy a real Nokia cable. Hopefully, it will work.

Is it possible to download an app by attaching it to an email? I don't see a
way of detaching it and putting it into the "applications" folder.
Hopefully, I can get it to execute there.

Or is there a way to upload my file someplace and have it "emailed" to the
phone?

Am I going about this the right way?

Thanks,

Ken