Thread List Modification

[ZiNgA BuRgA]

The only XThreads specific feature you really need to worry about is the Thread Grouping option (under the forum's settings).
And of course its related templates:

Quote:forumdisplay_group_sep and forumdisplay_thread_null - for use with thread grouping; defaults to nothing

I'm not going to give any help on actual HTML code - you need to figure that out yourself.  If you're not familiar with HTML, I suggest focusing on how the HTML <table> element works.  Conceptually, each thread is a table cell.