So How Do I Download Android Market to My Tablet?
Before proceeding, note that the first thing you need to do is root your tablet. Rooting is not possible on all tablets, and if it is possible it has some risks. Namely, it voids the warranty on your tablet. Click on the link above to read details on the procedure.
Another option is to confirm that your Android tablet has a low level of user security. For instance Advent Vega tablets will allow you to install some apps that otherwise require root access, and as you will see in the section below, there are locations other than the official Market from which you can download Android apps.
Next, run the browser on your tablet, and visit:
This will download Google Play Store to your Android tablet, and after restarting your device the app will update to the latest version.
An alternative to this is to flash (a term to install a new version the OS) your Android tablet to run a different build of the operating system that already includes the Market.