Upload multiple bundles for single android application

[Wli_Android]

Hi,

I'm developing one android application which needs to support Android OS 1.5, 1.6, and 2.0.

I've three different .apk files for all three OS.

How can i upload three different .apk files on Android Market Place for single application?
I would like to have all 3 versions available under one application name. is this possible ?

also can i submit app for ver 2.0 first and then add ver 1.5 and ver 1.6 later under same app ?

So, users with any operating system can use my application.

Thanks.