Hi ,
I am not sure I have understood you ; there is nothing like a Windows startup folder for a workbook , there is a Windows startup folder where you put the shortcut for starting Excel itself.
There is also an Excel startup folder , where you can have the workbooks which you need to be opened automatically when Excel is opened.
It seems that this is not what you want ; you want that Excel should be opened , I do not know whether automatically or manually , and you want the file to be opened , I do not know whether automatically or manually , and then you want that when the file is saved , it is saved to the XlStart folder.
If a user is so ignorant , where is he / she going to save the file the first time when they will receive it either via email or via a download from some file-sharing site ?
Anyway , I hope someone else will answer your question.
Narayan