The Synology has a WordPress module, which works great and it is a recent version (not the latest). But you are bound to having your weblog in the folder “/wordpress”, and my weblog resides in “/blog” for ages now. I couldn’t find how to change it by modifying PHP files, wp_options entries and just renaming the folder. So….
# mkdir blog
# cd blog
# unzip /tmp/wordpress-3.4.1.zip
# mv wordpress/* ./
# rmdir wordpress
And point your browser to the URL “synology-ip-adres/blog” and do the install.
I used the database credentials created by the Synology WordPress module, and vanilla-WordPress then says: Hey, already installed. Via the Admin panel you upgrade your database, and you’re good to go. Now disable the Synology WordPress module. I haven’t uninstalled it, since I don’t know whether it will actually delete the database too.