Change Yahoo URL in IM Presence Macro

Using the Yahoo selection in the IM Presence macro in v 4.3.2 references an obsolete page: http://messenger.yahoo.com/web?im=username

This page states that Yahoo messenger has moved inside of Yahoo mail. The link is a dead end. So the built in code for this macro is no longer useful.

Propose instead that the code reference: "ymsgr:SendIM?username"

Our current workaround was to create a shortcut link using "ymsgr:SendIM?" and asking user to enter an Advanced Link that utilizes this shortcut and supplies the username. However, this causes us to lose the presence indication, as the username shows up as just a link.