how hard are glow guages to install??

Im thinking about installing these gauges, has any one installed guages that also require wiring to light up at night? How hard is it on a scale of 1-5? I doubt it will be much of a problem but I want to find as much information as I can before I buy any guages.

these are the ones I was looking at to buy because they don't require you to remove the needle and I like the look of them, just intimidated by the wiring: http://cgi.ebay.com/ebaymotors/99-2003-Ford-Mustang-V6-120MPH-White-Face-Glow-Gauges_W0QQcmdZViewItemQQcategoryZ43952QQitemZ8002 098494QQrdZ1

thanks in advance..

I installed these UPR ones on my car.
http://www.uprproducts.com/images/parts/all/gauge_animation/90_93_V8_140_46K_EL_LRG.gif

It was veery easy. I just had to remove the cluster and install the gauges faces which overlay ontop of the stock ones. Wiring is easy, the gauges come with a control module that connects each face, then theres just postitive, negitive and a illumination wire.

yes vary easy the hardes part is taking some screws out to get to the gauges.