FYI-- when importing screen saver programs to XP Home:

Eliminating the space character from the screen saver filenames fixed the
screensaver startup problem on my XP Home installation. (Per other posts,
Power DVD and/or wireless mouse was not my problem.)

If your screen saver filename(s) contain space character(s), make copies of
all associated files in their same folder(s). Files generally reside in the
C:\WINDOWS\system32 folder. Edit each copy’s filename to eliminate space
characters. Do not alter or delete the original files. If there is a .log
or other text file that contains associated paths and/or filenames, edit this
file also. Select the new filename in the Display Properties Screen Saver
drop down list. Perhaps it will work properly this time.