HCFR is the way to go. Use this link to get full instructions in English on how to do the calibration using HCFR.Cheaper (free) is HCFR. While they have plans for a DIY colorimeter too, the software does support the Spyder3 - I've had it running and you get a virtual information overload out of it. Will probably take a bit to figure out how to use it properly because the documentation is in French.
I bought it to use with my Pio 710HD RPTV but that died before I got to it. I'm now going to use it with my Panny PT-AE4000U projector - yes, it says the Spyder3 does front projection... it even comes with a holder to mount it on a tripod. I haven't quite got to that yet - the system's only one month old.