A full SSP distribution - ok. However no single ghost distribution (again).

If you still got SSP, open archive - then extract specific ghost directory folder to your ghost folder:

For example:
Kaori.1.rar\Ukagaka\SSP\ghost\kaori\  to  C:\SSP\ghost\kaori\
or
Ghost.zip\Ghost\ghost\Sam and Max\  to  C:\SSP\ghost\Sam and Max\
or
Ukagaka [Ichi Bundle].rar\Ukagaka [Ichi Bundle]\ghost\Ichimatsu\  to  C:\SSP\ghost\Ichimatsu\

flele:
Flele (English).zip\Flele (English)\ghost\flele_aya\  to  C:\SSP\ghost\flele_aya\
Flele (English).zip\Flele (English)\balloon\flele_balloon\  to  C:\SSP\balloon\flele_balloon\
Flele (English).zip\Flele (English)\balloon\flele_balloon2\  to  C:\SSP\balloon\flele_balloon2\



Well, only directory folders like kaori to kaori, sans to sans etc. - leave the rest alone.
So you did do no installation routine, you have to restart SSP if still running.
Till then you can see new entries at program's menu points 'change ghost' and 'call ghost'.