is it possible? (need some changes in source code, i think)

[Henkou]

Hello, is it possible to do such things:
1) change the font color for user title, such things as

Join Date: Jun 2007
Posts: 112
Design: Blue Lagoon

and the color for text used as default in posts. and not for all users, but for different for example admins get orange color, moderators -green, others - standart.
2)to set an image in each post in the corner for example, somewhere near signature ... maybe as background image.... also for different groups
for example each admin gets a spider image in his right corner of each post
each moderator gets another small image in his right corner
thanks=)