memory_limit 8MB?
can you increase it, about 24MB?
try drop your modified php.ini to your root folder.
your CGI server may use that.
EDIT:
check your files inside manager, instead.
perhaps something changed.
your main website is still running.
don’t mix the 0.9.6.3 files with 1.0.2.
just overwrite everything from 1.0.2,
EXCEPT the config file.
If it installed, and you can see the default home page, then you’ve got mysql. I’ve installed 0.9.6.3 with a default memory setting of 8mb with no problems, so I doubt that’s your problem either.
Try uploading the manager folder again; some files may have gotten corrupted the first time.