1. A method of estimating marketing media planning strategies comprising the steps of: a&rcub; downloading first market rating data from a first marketing data source to a first database; b&rcub; downloading second market rating data from a second marketing data source to a second database wherein said second market rating data covers the same market as said first market rating and said first and said second markets are the same markets or similar markets substantially comparable; c&rcub; tabulating said first source marketing data to form a first vehicle linkage table; d&rcub; tabulating said second source marketing data to form a second vehicle linkage table; e&rcub; providing a graphical user interface allowing user adjustment of at least one data element of at least one of said tables, f&rcub; allowing at least one competent advertising market researcher to manually adjust at least one data entry in at least one of said tables to model at least one projected marketing scenario and thereafter using said user-adjusted tabular data in combination with said downloaded tabular data as input to at least one subsequent statistical calculation modeling the outcome of at least one projected marketing scenario.