JDOOM and the md2 replacements

ok I hate to sound like a newbie but i have little experince with JDOOM and i want to know how to get the MD2 replacements to work

I have questions about JDoom as well. And they are yes or no questions:
-Can you use other peoples WADs ie. one I made with DMapEdit?
-Can you use WADs that Wintex was used on?
-Can you use .deh files?

1.yes
2.yes
3.no

I think the md2's were disabled on Dtest2