this is common knowledge, i have just forgotten it — to widen the primary column in an apache directory listing :
Alias /alias /location_of_alias <Directory "/location_of_alias"> IndexOptions NameWidth=* </Directory>
/alias with the alias to be used. also replace
/location_of_alias with the actual directory/location that is going to be referenced.
and obviously, this is to be added at the end of the httpd.conf