A PHP CMS using SQL Server... or roll my own in Codeigniter?

[eluser]tolyx[/eluser]
Hi guys

We have a requirement from a client to develop a micro site using SQL Server as the db, but which can use PHP (on IIS).

I'd prefer just to take an off-the-shelf system and go down that route just to save time, so does anybody have a suggestion for a good PHP/SQL Server CMS combo?

Otherwise I'll roll my own in CI.

Thanks,

Dan.