Adding section signs to command blocks

Hi, I were wondering if anybody knows how to add the section sign (§) to a command block, in order to format the text?

I know I can use SethBling's MCEdit filter called ColorCommandBlockText, but it doesn't allow me to use multiple formats. Let's me give you an example of what I'm trying to accomplish:
This text suddenly turned blue and then red, and now it's back in black and it's even bold!!

By typing:
say This text §1suddenly turned blue §4and then red, §0§land now it's back in black and it's even bold!!

SethBling's filter only allows me to use one formatting throughout the entire text.

I tried to write my own filter in order to do this, but I gave up, as I couldn't find a list of the functions that the filters use.

I'm willing to edit the NBT data manually, if somebody could just point out a way to do so.

Thanks in advance,
FRANK