Well, as I said, it is already rendered using a bundled plugin in JIRA. You will have to modify that plugin. Can't change it with another plugin :)
http://www.j-tricks.com/1/post/2012/05/modifying-atlassian-bundled-plugins.html explains some details about modifying bundled plugins.
Anyone have the specific mods need for the JIRA Linker Plugin to add other columns to the Issue Links area?
For example, code to change the columns displayed on the Sub Tasks section of an issue ticket via jira-config.properties looks like this:
# Adds issuekey to the default list of fields to show jira.table.cols.subtasks is set to issuekey, issuetype, status, assignee, progress
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