How to setup default separator to open csv files?

I am opening csv files many times a day and all my csv files are seperated by , (comma). So I dont want to give/confirm the seperator to open csv file. so I wanted to know how to give default seperator to open csv files.
Thanks in advance,

If files always have the same file-name, you can do it through Menu/Insert/Sheet, activating the link option, next time going to Menu/Edit/Links/Update.

There are a couple of extension that perhaps can be useful.