look for 3rd party picall designs {uses cmos and tll to get accurate voltages}
they are free designs and there is no need of the companies voltage control firmware
why bother with a programmer
ANY pic can be programmed from three wires
unless you plan to fly your pic to the moon
or use it in very crytical situations
why bother with low voltage programming
http://www.sonsivri.com/forum/showthread.php?t=988 look at this thread
most user agree this method works fine for development
if you seriously need a production grade programmer
then there are far better programmers and far far cheeper
like the chinese TOP series look for TOP 2005 2004 2048usb etc
http://members.shaw.ca/topprogrammer/ cost about 50 - 200 euros complete depending what level you need and can justify
tip is to pay in u/s dollers
http://members.shaw.ca/topprogrammer/moreTop2048SupportedList.htm makes a picall look lame ?? yes...!