Using "manufacturers" as a mechanism to inter-relate products that are specific to a key group (such as a designer) is a good idea, and usually requires a change of the LABEL (define statement in language files) from "manufacturer" to "designer".
Such a LABEL change is necessary only in the "catalog" side of the installation (that part of the site seen by your shoppers).
I use it in a number of instances:
1. A website selling art prints by various artists, where I have changed the label to "Artists"
2. A website selling football shirts where I have changed the label to "Football Teams"
To find instances of "Manufacturer" in the Define Statements, use the following tool:
admin >>> tools >>> Developer Tool Kit
... where your search will be in the Language Files, for the text string Manufacturers
The statements that will need editing will be things like:
PHP Code:
define('TABLE_HEADING_MANUFACTURER', 'Manufacturer');
Which you will edit to read:
PHP Code:
define('TABLE_HEADING_MANUFACTURER', 'Designer');
You will NOT change:
TABLE_HEADING_MANUFACTURER
That is an UPPERCASE CONSTANT that refers the content of the define to other php files and to the database (where necessary).