customr 404 page in blogger/blogspot...?

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Guys,I mistakenly deleted a past in blogspot and now i cant create a post with the same URL. I know blogspot don't have the option to rename a post! That S*cks! The take the first few works of the titel and make the post name they want to! We dont have any control on our own blog!!! Well, now what i wanna do is to create a custom 404 page in my blogspot blog.....can i do it? please help me out if anyone of you knows how to do it....