Additional Task Hyperlinks

Currently we are limited to 4 Hyperlinks in SI Task Custom Fields settings - We use these hyperlink fields for quick access to Share Point Folders for projects in mobile (for example) and frequently could use 1 or 2 more. Is it possible to increase either the total available hyperlink fields to at least 5 similar to text, list etc. or give us the option to convert unused custom fields from 1 type of field to a hyperlink field?