Creating webpart zones for td

HI,
I am using ASP.NET 2.0 and C#.
I have a html table, which has 2 rows and 2 columns.
I want to create web part zones for these 2 rows and 2 columns.
For each td, i want a web part zone, so that users can move data across the table.
How to create web part zones for the td?
Thank you 
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