Plesk 8 uses patched Qmail. How do I compile Qmail with my own patches?

Most questioned issue. how could we recompile plesk qmail with needed options and patches? If you wanna do it just check the bellow link:

http://kb.parallels.com/en/1161

all parallels patches provided from plesk 8.2 to plesk 9.0 , which by the way can finally use postfix