On my album.php i use
printCustomSizedImage('', 100, NULL, NULL, 100, 100, -0, -1, "reflect rheight20 ropacity40", NULL )
function to print thumbnails and
getCustomImageURL('', '', 550, $cropw, $croph, $cropx, $cropy)
to get link to showing pictures (i'm using lytebox for this).
But in function printImageStatistic, which called by printLatestImages, used getURL($image) function for picture link and $image->getThumb() for thumbnails. How i can use my functions instead ?

You could use getImageStatistic() to get an array of image objects then use your own printing much as you have done for the thumbnails.