I had downloaded Rufus recently and went through the installation of the 7 OS onto my USB. When I went to install on my to be 7 machine it did not have UFI capability. In frustration I tried another method and again had some problems. Restarting Rufus I read the FAQ and it described how to change the format to MBR with BIOS as the target.

After a couple of tries on my to be 7 machine where I had to do a custom install it seemed to work. It looks like it kept the Vista OS but that is OK.

Regards,
Dan