Dreamweaver trouble

Hi,

I'm using a 30 day trial of dreamweaver and have run into a few problems.  
Firstly, whenever I insert an image which is not in the same folder as the 
document it gives it the following address:

[Unable to display image]

How can I make it give me [Unable to display image]?  It was asking to copy 
the images to the same folder as the document earlier on today, but has 
stopped now.  How can I turn that back on?

Secondly, when I draw a table, and then insert a picture larger than the cell 
into it, it re-sizes the cell horizontally as well as vertically, which 
throws the alignment of that row of the table out.  How can I fix it so that 
the cell does not re-size horizontally?

Finally, is there a way to make the default fonts on the page be Arial, 
Helvetica, sans-serif?  I'm getting fed up having to highlight the text every 
time I want a document to have those fonts.

TIA

Peter.

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