Does anyone know whether linux supports installs on multiple machines simultaneously?

it would depend on the distro, i am not familiar with one but there are lots of distros out there. if the machines have reasonably similar specs then you can just use dd to copy a hard disk to another, the hd's will have to be the same size though.

Thanks for the reply, I'm currently considering mandrake 9.1. I'm using it on one machine and it works just fine, but I need to install it on numerous machines that I have not even seen. If there is more info required of me please reply and I will deliver what I know so far.

well i cant guarantee it will work, but get a harddisk from from the machine you wanna install on, now assuming that your disk is /dev/hda and the empty disk is /dev/hdb then dd if=/dev/hda of=/dev/hdb bs=1024k should produce an exact copy of your disk on the other one. the other technique though slightly longer is(i think) guarenteed to work, as before install the other disk, using fdisk and mkfs set up the partitions correctly then mount them. then you can do something like tar cv /usr/* | tar xvC /path/to/new/usr for each partition.