PDFLab lets you split and join PDF documents as well as insert images and blank pages. You will also be able to easily create PDF documents out of several images.
Its usage is really simple. You add your files in a list, select the pages you wish to include, order them the way you want and create a new PDF document.
PDFLab 2.0 also ships with tools that let you quickly split a document into many documents, (one document per page or one document for odd pages and one for even pages), encrypt or decrypt a document, add a watermark, interleave several documents.