First off do a
SELECT * FROM `w3t_Groups`
to find the group number of the titles you wish to change, then do a
UPDATE `w3t_Users` SET `U_Color` to '#B2B42E' WHERE `U_Groups` LIKE '%-NUMBERYOUFOUNDOFGROUP-%'
this will change all the User names to Gold but thats all
the only way to alter the Titleswould be to find every occurence of U_Title in every template and add a font tag to it, or you could try
UPDATE `w3t_Users` SET `U_Title` to '<font color = "#B2B42E">Gold Member</font>' WHERE `U_Groups` LIKE '%-NUMBERYOUFOUNDOFGROUP-%'
but that would change also.. what I would do is write a little code that changed the font color in the templates but thats me...