Strange that X5 shows them as installed?
The easiest way --- using X4 drag all title clips you need to the timeline.
Use Shift + Click to select adjacent/all clips.
Note X4 came with 24 titles, each installed Title Pack added 10 titles.
Save the project.
Open the project using X5
Drag the titles to the library, may take a while to load.
Now save the library, just in case?
Settings Library Manager – Export library.
The library title file is called VS_Title.dat
C:\Documents and Settings\User Name\Application Data\Ulead Systems\Corel VideoStudio Pro\14.0\en-US
At one time we could simply move this file from one version to another, however moving/modifying the system files in X4/5 may cause the program to fail. So take care. The approach above is the safest way.