So late with custom post types and portfolio. All the while I had been adding projects as normal blog posts but under a category named 'portfolio'. Would there be anyway to migrate the existing blog posts published under 'portfolio' category to new portfolio custom post type. I have a feeling that I will need to swim through lot of mess if I have to use this new feature. I don't think i can delete existing posts as it will result it 404 errors when people reach my site through google search.