Parsing and updating of Freemarker and JSP template scripts according to lists in http://wiki.magnolia-cms.com/display/DEV/STKUtil+methods+migration+for+4.5 and http://wiki.magnolia-cms.com/display/DEV/Tags+migration+for+4.5.

The FTLs/JSP must be read from the file system.

Detecting of pieces of code, that could use area feature and generate migration scripts that could be run later in order to create this eventual new configuration.