Those are bootlegs. Reports at other message boards have generally been negative regarding their quality (not surprising considering 3 or 4 movies are put on a disc). Fox is also in the process of having them shut down for copyright infringement.
The good news is that Vol 1 of Fox's series of Chan releases is coming June 20. If fans want to see all the Chans and the Motos get released, the legal versions have to sell well. Early reports offered by posters at another Chan board indicated that Fox was looking to release at least 4 DVDs every quarter which should indicate a "fast track" approach to getting these out.
I'm really looking to Volumes 2 and 3 which should have my favorite Oland films included.