Quote - But how do you convert from Ryan2 to Ryan2 and what does that accomplish?

It allows you to make the clothes fit a morphed figure.  Say, if you have a dress for Vicky but it doesn't fit the size 34F boobs you put on her.  WW will let you fit the dress to her morphed body.

For Tyler, it would probably be easiest to make a single morph for him. See question 9 here:

http://www.philc.net/WW2_FAQ.php

Name the morph "tyler" or something easy to remember, then you will see it and be able to choose it off the menu.

Eventually, WW will ask you to locate the Ryan 2 CR2.  Navigate to the Tyler CR 2 and pick it. 

Depending on the clothing item, you may have to use the deflate/inflate, smooth, etc., to make it look right.