Digital BW, The Print

Hi All
I have recently loaded Panther onto my MAC. I have an Epson 1270 
printer and I am using the drivers for it which come with Panther
Now I am faced with a bewildering array of options.  I either use the 
printer for documents or for printing photos.  Can anyone explain some 
of these things to me and what setting I should be using for photos.

1	There is a huge range of paper but when I choose the appropriate 
paper it does't seem to have any effect on the other 	settings - so 
what effect does choosing the paper have?

2	 Under Resolution there are the following options.  What do they mean 
and what should I choose when I want to print photos? (Some I 
understand but I have included them all)
		360 DPI
		360 DPI Unidirectional
		720 x 360 DPI
		720 x360 DPI Undirectional
		720 DPI
		720 DPI Undirectional
		720 DPI High Quality
		720 DPI High Quality Unidirectional
		720 DPI Highest Quality
		1440 x 720 DPI
		1440 x 720 DPI  Unidirectional
		1440 x 720 DPI  Highest Quality

3		Gamma is set at 1.0
		Should this be changed to 1.8?

Cheers
Trish