I've "googled" and got this.
"Download apps for Samsung Galaxy Tab from outside the Android Market
Android apps come in the form of APK files. You can use Google to find free APK files for your Galaxy Tab, then install them using the steps below.
Note: This method should probably only be used by techies or people who really know what they are doing. Installing APK files from some sites can compromise the security of your device.
1. Open Settings.
2. Select Applications.
3. Check Unknown sources to enable app installs from outside of the Android Market.
4. Open Android Market and download and install Astro File Manager.
5. If you used your computer to download the APK file, mount the Galaxy Tab to your computer and copy the APK file to the device. If you used the Browser on the Galaxy Tab, the file should be saved to the device.
6. Open Astro File Manager.
7. Navigate to the APK file location. Tap it and select Open App Manager.
8. Tap Install.
9. Tap Install again"
But my problem is that I cannot comply with step 3. It doesn't give me that option.
I've copied the apk file to my sdcard and installed Easy Installer App from the market to help install it. The Easy Installer App sees the apk file but when I click to install it, it shows:
" FOR SECURITY, YOUR PHONE IS SET TO BLOCK INSTALLATION OF APPLICATIONS NOT OBTAINED FROM ANDROID MARKET."
It give me the option to click the setting button but I can't find the menu to allow installation of non-market apk files.
Thanks for the help.