ASP hidden Query Strings

Server header response

[super_seo]

Hi,
working on a new site that will be dynamically driven.
I think i'm right in saying that the queary strings should be hidden to make it easier for G to index?

So we'll make the pages appear as .htm

I'm just wondering on the server header response that returns on these pages ie:

X-Powered-By ASP.NET
X-AspNet-Version 1.1.4322

Will the SE's penilise these pages in anyway?
Is this a form of cloaking, the pages appearring in htm form even tho the server headers show its .asp
If this does upset the bots could anyone give me some guidelines on a better way?
Any assistance would be greatly appeciated.

[super_seo]

<Bump>
advice anyone please.

[bakedjake]

Will the SE's penilise these pages in anyway?

No.

Is this a form of cloaking, the pages appearring in htm form even tho the server headers show its .asp

No.

You should be fine.

[super_seo]

Thank you.