Multi-question answers!
Keza, if you find a flower you want to add to the image (from a website or forum) just right click and select copy. Then past it into the image you're modding. You can also use the Picture tubes in Corel Paint Shop Pro XI.
Other good programs: Nahh... Not really LOL.
Kittenangel: Yah, I recomend Corel paint Shop Pro XI.