OSCommerce password protect a category

Hi all!
Bare with me, I have been looking for a way to do this for about 3 days now...and have gotten no where. I know this will be fairly simple but I was forced to take over the completion of my website not knowing a thing about creating or maintaining one, I think I have gone along ways since then!
Ok, what I need to do is create a category for wholesalers, I need to password protect this so only approved members (approved meaning I send them the login info) to access. I don't want to go into any more mods or add ons and I figured this might work, as I have seen other ppls posts with them be able to do it, just not going into detail on how they did it for the newbies like me
Here is what one girl posted, but not sure how or what she added:
"I think I got it figured out. What I ended up doing was creating a category named "Wholesale". Then setting up a wholesale password string in languages/english.php. I changed includes/boxes/categories.php to only display the "Wholesale" category if the user's password matches the special wholesale password string I set up in english.php. I also had to bypass encryption of that particular password by modifying password_funcs.php and account_password.php. By using the password instead of user name for displaying the "Wholesale" category, any number of user accounts can access it if I just give them the preselected wholesale password.
It may not be too elegant, but it was fairly simple and is working great."

Can anyone suggest anything?