How To Retain Leading Zeros (0) In CSV Files

When adding a value with a leading zero. for example 05710. Add additional quotes and equals:
"=""05710"""

With the CSV file resembling this:

a,b,c,d,e,f,"=""05710""",h,i

Sources:
http://social.msdn.microsoft.com/Forums/en-US/aae07b39-865f-4c68-a07f-7cad2dfd6733/how-do-i-open-csv-using-excel-without-deleting-leading-zeros?forum=isvvba
http://nebula-rnd.com/blog/tech/2009/07/excel-csv1.html