Create 4 columns pagetype in custom package

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HI Friends,

i created a package in that i want show my blog view.php result in 4 columns page, by using default pagetypes i can't get it because all are just left or right or full ... , so i want create a new page type in that i want show blog image,title, content...

any one please help me how can i create a new pagetype with 4columns and what is folder structure?

Thanks in Advance.

kranthi20