Now I see the problem, I place the philippines.jcv file on the wrong location. I put it on "Garmin nuvi G: / JCV / philippines.jcv". I can't find the .system folder (folder options is set to show hidden files).
Edit: Have been able to access the .system folder. Will put the JCV and gmapprom files inside .system with their respective folders.
Edit 2: It's now working properly, thanks to sir @Neil for the instructions and sir @syzygy for the garmin asian jcv tool. :D