i also had this issue- very annoying and haven't found a satisfactory sql answer myself yet (aside from long-winded ones involving creating temp tables etc.) and i didn't have time to explore it to the conclusion i'd have liked.
In the end just used SQL Server Management Studio to do it by selecting the table, right-clicking on the column and hitting rename. simples!
obviously i'd rather know how to do it without a gui but sometimes you've just gotta get sh** done!
