2
change the bit:
modules/sections/language/english/main.php, line 6
define("_MD_HEREUCANFIND","Here you can find some cool articles that are not presented on the homepage.");
Change the text (NOT the all-caps constant definition) to what you like.
For the hard return between images, I *think* I know where it is (never used the Sections module myself, so I am just guessing at the appropriate code)
modules/sections/index.php, line 73:
echo "$image' border='0'>
";
//change to this:
echo "$image' border='0'>
";
Not tried and not tested and may be a different code from what you mean, but let us know if it helped.