adding a CSS style to the wysiwyg

Hi all,

Really hope someone can help! Within the wysiwyg editor I noticed a style called Address. I thought it'd be great to add my own style testimonial for my client site.

I've therefore tracked down the 2 files I believe need editing:
/cmsAdmin/3rdParty/tiny_mce/themes/advanced/editor_template.js

I altered this from:
theme_advanced_blockformats:"p,address,pre,h1,h2,h3,h4,h5,h6",
To:
theme_advanced_blockformats:"p,address,testimonial,pre,h1,h2,h3,h4,h5,h6",

/cmsAdmin/3rdParty/tiny_mce/themes/advanced/skins/default/ui.css
And added this:
.defaultSkin .mce_testimonial span.mceText {color: #EC8002;}

After this line:
.defaultSkin .mce_address span.mceText {font-style:italic}

However, the new style doesn't show once I upload the files and refresh my browser.

Any ideas?

Thanks in advanced!

jarvis