I have but it isn't taking me any where ..  that is why I am asking here

Does it show anything?  Are you on the search page?

Change it to:

<blahS URL|v=='search'>

As it says in the first message.

Ok thanks it work now,
I hav added this to my main template

<blahS URL|v=='search'><META NAME="ROBOTS" CONTENT="NOINDEX,NOFOLLOW"></blahS>
<blahS URL|v=='pm'><META NAME="ROBOTS" CONTENT="NOINDEX,NOFOLLOW"></blahS>
<blahS URL|v=='recommend'><META NAME="ROBOTS" CONTENT="NOINDEX,NOFOLLOW"></blahS>
<blahS URL|v=='memberpanel'><META NAME="ROBOTS" CONTENT="NOINDEX,NOFOLLOW"></blahS>

and how I see extra

<blahSURL>
<blahSURL>
<blahSURL>
<blahSURL>

in the source of every forum page?

What do you mean by that last part?

I mean that now when I veiw the source code of any page of the form than I see the 3 tags of <blahSURL> in it
which I think that should not be there as it should get converted to some kind of html tag or get completely removed

Code if($_ =~ s/<blahS (.+?)(\|(.+?))?=='(.+?)'>(.+?)<\/blahS>/<blahS$1>/)

Code if($_ =~ s/<blahS (.+?)(\|(.+?))?=='(.+?)'>(.+?)<\/blahS>//)

I have tried the replacement mentioned by you but after it the modification stops working and I also don't see the custom text in the headers?

Instead, change:

Code $_ =~ s/<blahS$1>/$change/ if(${$1}{$3} eq $4 || $1 eq $4);

to

Code $_ =~ s/<blahS$1>/$change/ if(${$1}{$3} eq $4 || $1 eq $4); $_ =~ s/<blahS$1>//;

Thanks it works now