wondering what the padding is between image's... ive got an area in width " 615 "... and i am going to need 2 to 3 rows/ 3 columns placed in that area...

right now i am making the image's ( dimensions ) 198 x 188... i also need each picture to go a website--- is that possible and where would i edit this at?

also i installed the gallery... is it just a plugin and not a module? wondering...
thanks
trey