cd %QTDIR%\src\plugins\sqldrivers\psql
qmake -o Makefile "INCLUDEPATH+=D:\Arquiv~1\PostgreSQL\8.2\inclu de" "LIBS+=D:\Arquiv~1\PostgreSQL\8.2\lib\ms\libpq.lib " psql.pro
make.

yes, i did this before and got:
qsqlpsqld4.dll; qsqlpsql4.dll; libqsqlpsqld4.a; libqsqlpsql4.a.
The dlls were generated in folder qtdir\plugins\sqldrivers.

The diference is that i used "make" not "nmake". I am using MinGW

is missing something else to load driver psql?

thanks,
Rogério