Here is the link that has the licensing information. http://www.microsoft.com/oem/en/lice...ges/index.aspx
Here is a couple sections of the licensing saying you may not use an OEM version.
2. Authorized Distribution and Acceptance. To distribute the Software or Hardware in this Pack, you must be a System Builder
and accept this license. “System Builder” means an original equipment manufacturer, an assembler, a refurbisher, or a software
pre-installer that sells the Customer System(s) to a third party. You accept this license when you open this Pack. If you choose not
to accept this license, promptly return the unopened Pack to your distributor. You may only distribute unopened Packs within your
territory. For the territory in which you may distribute, see www.microsoft.com/oem/sblicense/territory. Individual Software or
Hardware units may not be returned after the Pack is opened.
4. Limited License. If you comply with the terms of this license, Microsoft grants you a limited license to distribute the Software or
Hardware. Except as granted in this license, you may not use, run, copy, modify, display, distribute, repackage or reassemble the
Software, Hardware, OPK or any part of them. You may not reverse engineer, decompile, or disassemble the Software, Hardware
or OPK, except to the extent expressly permitted by this license or by applicable law notwithstanding this prohibition. All rights not
expressly granted are reserved.