Can't install OSX 10.7 Lion on old Mac Pro...

i've got an old mac pro... i think it is 2007 or 2008 vintage... it is the 2.66mghzzz model...
it is so old it can't run OSx 10.8 and up... so I am stuck running 10.7xxx
anyway, system disk died recently...
made an OSX 10.7 install thingy on a 8gb USB drive using my new Macbook Pro...
problem is the install keeps hanging after starting the install... i've attached screenshots showing how far it gets...
i've let it sit for a few hours and no progress... i reckon it should normally finish installing of a USB stick in maybe 30 minutes or so?
is it possible that the 4tb SSHD drive i am installing onto is too big for this machine?
it has been using other 4tb drives so not sure this is an issue?
really stuck here... argh...
thanks

thanks for your reply...
yes, I realize it will only install on older macs... my Mac Pro is the 1,1 model... the 2.66mhz processor is from the 2006-2008 era....
i believe it shipped with 10.4 or 10.5 OSX...
it was previously running 10.7.5 which is the newest OSX that was allowed to be installed on it....
so it should allow 10.7 to be installed? Or do I have to start with the much older osx?
I downloaded Lion 10.7 from the mac app store and it of course wouldn't let me install it on anything, even the 4tb SSHD drive when I connected it via USB/SATA adapter to macbook pro as it is too old for running 10.7 install on this machine but I was apple to use SuperDuper app to make a boot drive of the 10.7 download form the mac app store onto a 8gb USB flash drive and make it bootable...
The 4tb SSHD drive appears to work on system as I can run disk utility and format it and mount it etc etc...
Perhaps there is something wrong with my install USB flash drive I made? I am really stuck here...
thanks for your help...

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