1. If you're getting checksum failures then your download didn't complete successfully. Try downloading again. If you have to, use a download manager. Firefox has several download manager extensions that are good.
2. The easiest way to install SDKs for Android it to use Eclipse ADT plugin.
This way you only need to:
- Download and unpack SDK
- Install ADT Eclipse plugin
- Point ADT to SDK location (
Window -> Preferences -> Android -> SDK location
) - Use
Window -> Android SDK and AVD Manager
to install selected SDK revisions.
That's it.
3. I had the same problem with wrong checksums. I've disabled my antivirus (AVG) and they downloaded successfully.
4. There's no need to be snarky. This is obviously related to programming if you can't download the tools you need to get the job done.
This thread indicates that you may have username/password issues since it appears that the result of 93 bytes means wrong username / password. http://code.google.com/p/android/issues/detail?id=25294
So make sure your account is set up and you've entered your login information to be used during the download. A dialog should pop up for you to enter the info during the download.
Still trying to figure out what my 91 and 92 byte results mean...Good luck!