I need some assistance...

I created a webpage with dreamweaver. The site is:
www.christinagriffinarchitect.com To get a better understanding of my problems
you should view the sites layout. Now I am facing three problems, that I can't
seem to resolve followed by a few questions. If you can help me out in anyway
possible I will be greatful. Feel free to give me a call. My number is
914.207.4188

The three problems:

1st. I am trying to place more images on my site, but dreamweaver is being
stubborn and no longer accepting them under .jpg's and request them to be html
or xml. A few day ago, I wasn't facing this problem at all. Why is this, and
how can I upload new photos on the site? Am I placing the images in the
inccorect folder?

2nd. I am trying to create a link from a small image template on my site to a
larger one. For example, When you click on an image displayed on the page, it
will open up a window with a larger image. The image size will be specified by
me. I have tried various processes, but it seems to not work. What should I do?

3rd. Currently I have the funtion to change images in a marquee sense, by
clicking on an arrow and being able to click back. I want to apply more images.
Is there a specified folder I should place them in, because I can't seem to
find it? I also want to know is there a format the images have to be in?

I greatly appreciate your time in reading this, and I hope you can help.
Cordially, Said

1st. I am trying to place more images on my site, but dreamweaver is being
stubborn and no longer
accepting them under .jpg's and request them to be html or xml.

Can you explain this? How are you trying to add the images? What message is DW
displaying?

2nd. I am trying to create a link from a small image template on my site to a
larger one.

It seems to be working correctly for me. Can you give a specific example of an
image that is not working correctly?

Is there a specified folder I should place them in, because I can't seem to
find it?

There is no special folder. You can put images or any other files in any
folder. Folders should be used to help YOU organize your site.