Managing multiple AD sites

Does anyone know of a tool that enables me to manage/administer multiple (unrelated) AD Sites?

As part of my job, I travel around quite a bit and if I need to access say Active Directory Users and Computers I have to do so from a client domain machine. My laptop belongs to my domain, so even if I have installed the Windows Admin Pak it wont let me access their AD system.

I am looking for something that will enable me to say, select a domain, provide appropriate admin credentials for it and then be able to use it like I'm joined to that domain without having to physically changing my laptop's domain and having to reboot, etc.

Perhaps a more relevant question would be: Is there anyway to give my laptop domain characteristics without "actually" joining it (of course I have full admin rights to all domain in question!)

Does that make sense?

TIA

No way that I'm aware of. I've had laptops in dual-boot configs for that very reason.

Oh well, worth an ask I suppose!

Well if you find one you'll have to post about it!