85
The procedure under __ideal__ conditions:
#1: Upload XOOPS 2.3.0 package
#2: Install XOOPS 2.3.0
#3: Prepare a copy of XOOPS 2.0.13 DB, for say xoops2013
#4: Upload XOOPS 2.0.13 module files onto XOOPS 2.3.0 (excluding "system", "pm", "profile")
#5: Modify mainfile.php with:
define('XOOPS_DB_PREFIX', 'xoops');
define('XOOPS_DB_NAME', 'xoops2013');
#6: Run upgrade scripts