After working on a web application which is made by Joomla 1.5 I thought it would be easier to have implemented if it was made by Drupal...

I have added Nivo Slider to my Joomla extension Views for Joomla as a sample layout. Hope this gives you an idea about how you can chuck in jQuery Gallery plugin into your Joomla site.

I have noticed the font size gets squashed with Joomla default template "bluestork" for backend when I edit the content by raw mode.

And this is what I do until the situation gets amended.

You need to amend the code to suit your situation but this sample code should give you an idea about how to do it.