Yes. You just can't install the OEM copy on two of more machine at the same or different time. OEM sticks to one machine, unlimited time install.
It will install but won't stay activate. SLP 2.1 table in the mobo required. Unless you know how to add one in yourself (and I am not going to help you with that since it is against all copy right law possible).
Unless I'm misunderstanding something, this seems to be contradictory. I don't plan on doing anything with SLP 2.1 since I know nothing about that and I really don't care too. I just want to know if the Branded Win7 work on custom PCs because the websites say they do. My assumption was because they where branded they had bloat ware and that's why they are much cheaper.