LVM on installed system in new hardware a problem?

[Joep L. Blom]

I yesterday got my new system (ASUS MAN78 PRo DDR2 + AMD PHENOM II 810) 
and as Gary assured it would work with an HD on which Hardy is installed 
without a problem (video is accounted for).
I decided not to migrate two other disks in the old system (too small) 
but they contain LVM partitions.
My question: what is the best way to copy the contents of the LVM 
patitions to the new system (to a 1 TB disk).
The problem is a little bit of a chicken and egg problem. When I 
transfer the hard disk with hardy to the new system, I can't run the old 
system any more and I can't use the network to do it.
Of course I could try and use Ubuntu-on-a-stick (see below) but my desk 
is too cluttered to allow another screen and keyboard.

An unrelated remark:
When I fetched the system from the local vendor I had an USB-stick with 
Ubuntu 9.04 with me. To test the system I put it in this machine (look 
at the motherboard) and for the amazed eyes of the vendor and a 
technician the system started (fast) without a hitch and ran flawlessly!
Try that with any Windows flavor!!
(I hadn't tested the stick before!).
Joep