Error in Install cognos 8 on Win XP - SP2 on IIS 5.1

[Parthi-1705]

Hi

I am having Windows Xp Service pack 2 IIS 5.1 i installed cognos 8.4 but i am unable to get in while i tried to log in it is saying as

http://localhost:80/cognos8/cgi-bin/cognos.cgi?b_action=xts.run&m=portal/close.xts
is not there

i tried with http://localhost/
it is working fine but it is not working for cognos
so i tried google but could not find any good result in IBM or in some other form thats why i have posted here.

In IBM Site i find out

How to configure the Cognos 8 gateway in IIS 7.0 on
http://www-01.ibm.com/support/docview.wss?uid=swg21343353
Here i followed till step 6 but after i couldnt since it is iis7.0 and mine is iis 5.1

Since my system is IIS 5.1 i could not get ride of this
If any have doc or any solution on this it will solve my problem

http://localhost:9300/p2pd/servlet/dispatch

http://localhost:80/cognos8/cgi-bin/cognos.cgi?b_action=xts.run&m=portal/close.xts

Any step by step process will help me out to solve my problem.It is urgent

Thanks
Parthi