blue screen of death when windows 7 is trying to complete install on iMac late 2006 running on Lion 10.7.5 with bootcamp 4.0.4...can someone pls help and thanks

trying to install windows 7 32bit ultimate on my late 2006 iMac with bootcamp 4.0.4 running on Lion 10.7.5, but it can't complete install, the BSoD appears as soon as it tries to reboot to continue setup, last stage reached " setup preparing computer for first time use and registry change" never seen reaching setup checking video performance then BSoD kicks in followod by black screen sayinng windows did not shut down properly, tried in safe mode, with advance mode, rebooted in install disk and ran repair, says cant fix it automatically, with messge 07: Failure during setup o.s. version 6.1.7600.2.0.0.256.1, tried to install nvidia geforce 7600 but mac says cant or not needed, been trying everything i can for 2 days no sleep...im slowly losing it

...any help will be appreciated and thanks