These questions could really all go in the original thread you made.
It is possible, the jersey textures themselves are easy enough to export and import into NBA Live 06's files. The numbers are a little trickier and require a bit of manipulation though.
well i know how to add jerseys, but i dont know how to make them..where are the faq for that?...and it dont look like u can i tried to look but i cant seem to find anything relevant
Check the Tutorials subsections in the Forum, as well as the Tutorials section in the Wiki. There's also a couple of downloadable ones in our Downloads section that include templates.