build a macro or small program

I have an Excel Spreadsheet to be used via a macro to place ads on USFreeads. I can do the macro one row at a time myself, I do not know how to tell the macro to go to the next row and if cell is null stop macro else continue. there will be from 1 rows to 20000 rows at a time. I tried jitbit macro recorder to do this. This is not a complicated job and I really do not want to pay more than about $20.00. I will give you a copy of the spreadsheet and a screencast of the individual steps required. [login to view URL]