Customizing admin, have additional fields in category creation

[om.singh]

While creating a category, we can currently add on image, I want to add additional images with a category. Is there a way to add additional image adding panels to the exisiting category creation panel.

Also there are custom1 to custom3 field- which hold text, is it possible to change that to text area like the description. This will be very useful to hold short information. Other is there a way to increase the default size of the custom fields in the category creation screen.