You can change your windows list separator to a semicolon.

Go to windows control panel, regional and language options|Regional options tab
then click customize and look for List separator on the Numbers tab.

I'd change it back when you're done--it's a windows setting and you may not like
it as your default.

Another option would be to use a macro.

You could use a macro and write code and have complete control over what you
write.

Here are three sites that you could steal some code from:

Earl Kiosterud's Text Write program:
www.smokeylake.com/excel
(or directly:  http://www.smokeylake.com/excel/text_write_program.htm)

Chip Pearson's:
http://www.cpearson.com/excel/imptext.htm

J.E. McGimpsey's:
http://www.mcgimpsey.com/excel/textfiles.html

Earl's program may work right out of the box.