Your table is of 60 pixels wide only so it cannot accommodate four cells with total width of 600 (150*4) pixels and cellpadding of (5*2--means 5 pixels of cell padding on each side of picture) and then multiply it with four cells of four pictures the total number
of pixels should be 40 (you are using 640 pixel space) plus all the horizontal space added to each picture.
The total space used is about 760 Pixels
Here I am not even counting the space taken by the text.
Picture and text cannot be in the same TD.
TD should end as soon as the picture is placed. Your TDs ended after the text.

Second cell can be used for the text

Horizontal space is added inside the cell of the picture. you see from the above image.
I put the border=1 to show what happens

Try to remove height from the TDs. TDs adjust automatically to accommodate the picture height.
The height attribute only in the "img src--" is sufficient.

All your pictures are not part of the Rootfolder that is placed in the Dreamweb (make sure that those are placed in the same folder where you are working in the Dreamweb as for you it is "Practice1)
create image folder in it and load all the pictures before placing.
Your pictures are still on your C drive. Those did not show up on my computer. I can see the
path it is based on C/My documents/dreamwebs/practice1----.
check out the source of this image that I placed here--
it is just placed in the images folder that I created for this web. I will
put all the htm pages connected with this site.

make all the file names really short.no capitals
no spaces in between (front of Irri.htm)
picture names should not be capitalized (FrontIRRI.jpg or Riceterraces.jpg)

To really see how your web looks like you have to check it on someone else's computer
then you will check all the links,etc.

I have not even come to your questions. we will handle one at a time.
cell spacing leaves the space between the cells. I did not use hspace tag here

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