Just checking on my old PD7 system :-
for me Custom menus, which are sequentially numbered, are
C:\Documents and settings\Adrian\My documents\Cyberlink\Custom menus\2.5\ menu_000
PiPs, titles and paths are
C:\Documents and settings\Adrian\My documents\Cyberlink\Powerdirector\7.0
As far as I can recall, if you copy these to the correct folder locations in the 'new' system, PD will pick them up after restarting.
It's some time since I did this so I hope this is correct. I cannot recall if all the files required, eg specific video/audio files, for the custom menus and titles etc are contained within the custom folders - I think they are but others will confirm this???
Life is really simple, but we insist on making it complicated.