Apps Questions for the group regarding URL Launchers

[afmob]

I have long had my WAP pages built and had my URL launchers built by an outsourced group in India. I now have a requirement to update my .apk files to 2.2 as well as build 6 additional .apk files that are made up of 6 completely different URL launchers to other WAP sites. I have successfully set up my Java and SDK environment

My questions are:
What is the best recommendation the group can suggest as a starting point?
How do I open the .apk file in my eclipse environment to make the changes necessary?

The Android Market says the following when I attempt to upload my .apk file:

Market does not accept apks signed with the debug certificate. Create a new certificate that is valid for at least 50 years.
Market requires that the certificate used to sign the apk be valid until at least October 22, 2033. Create a new certificate.
Market requires the minSdkVersion to be set to a positive 32-bit integer in AndroidManifest.xml.