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The last post here is a summary of the bulk upload process:
[webmasterworld.com...]
The second post in this one: [webmasterworld.com...] will show you what the columns are like in the spreadsheet
In order to build the sheet quickly I would use a default ad, and use a formula to build it in excel. A simple formula [=A1&" at domain.com" (where A1 is your keyword and the formula is your title)] would work, just make sure you paste the VALUES in the final document. If you need help on this just let me know.