I was a bit more creative with my blue LED bulbs by using 4 in total for the main display and 2 for the mfa. Plus instead of using the origional holders i aimed them directly at the face for a greater spread of light. Have a look in my project section for more info.
(http://img49.imageshack.us/img49/7773/consolediagram1vp.jpg)
(http://img335.imageshack.us/img335/882/dashcomplete5es.jpg)
(http://img300.imageshack.us/img300/7266/dashcompleteclose3mf.jpg)
(http://img107.imageshack.us/img107/2114/dsc002041qk.opt.jpg)
(http://img117.imageshack.us/img117/7527/dsc002057jh.opt.jpg)