the code I have downloaded was not having configure.exe
then I copied from my license version installed Qt dir.

then I given configure cmd with required option and I got following message:

Unable to detect the platform from environment. Use -platform command lineargume
nt or set the QMAKESPEC environment variable and run configure again
See the README file for a list of supported operating systems and compilers.

Usage: configure [-buildkey <key>]


this Installing on win Xp , which has VC2005 express edition.