Step 1. Firstly, download the Module at: https://www.vpcart.com/sales/addons900.asp
Step 2. Backup your site files below:
Step 3. Unzip mobiletop900.zip file and upload all the files to your shopping cart folder via ftp
Step 4. Log into super admin and run the topmobile_buy.txt file on convertsql.asp
Example: http://www.yourdomain.com/yourshoppingcartfolder/youradminfolder/convertsql.asp
Step 5. Click 'Convert' Button
Step 6. Go to Advanced Settings > Software Configuration and click 'Reload Shop Configuration'