How to get Classes in "Formatting" Drop Down Menu?

Hi,

I have been using FCK Editor in Joomla.

In Formatting Drop Down Menu, we have:

1. Normal
2. Normal div
3. Preformatted Text
4. Heading 1
5. Heading 2
6. Heading 3
7. Heading 4
8. Heading 5
9. Heading 6

I want to have .Arabic Class too here in this Formatting drop down Menu. How is it possible?

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Secondly, In "Font" drop down Menu, it shows following fonts:

1. Courier New
2. Tahoma

I want to add some Urdu Fonts here (Urdu is National Language of Pakistan).

How is it Possible?

I would be really thankful if some one could help me in this regards.

Regards.