Hi davobr, welcome to NICO Club!
DIY will save you money, but not much time... just the way I like it!
You get to learn as you go and build a tool set. Best tool for your car is the FSM. Here's a link to all the chapters. Check it out! Start at the FWD (foreward chapter) for a table of contents and go from there. Lighting and the wire diagrams should all be in one chapter. Each chapter can be downloaded to your device as a PDF using the download arrow that appears over the top left of each page of the FSM document.
http://www.nicoclub.com/FSM/Versa/2008_Versa/