Hi Reiss,
Yes, it sounds right. I will make the same change here to allow configuring them separately.
Currently, by default the same browser.html page is used for all browsing of images, files, links, Flash, etc. But they pass a query string param "Connector=" which points to a service url that provides data for the browser. Images and files use the FileBrowseConnector.aspx and Links use the LinkBrowseConnector.aspx page to provide the data.
I would be very wary about giving users direct access to the server file system as in the mojoPortal File Manager. Someone using this feature can break the site (by deleting skins or search index). I think its better to limit what folders they see to only what is needed, perhaps a pre-difined folder where images go. But maybe you have added logic for this.
Best,
Joe