Have a look at our software at www.dbmanual.com
The output of our SQL Server Tool is a MSDN alike style, only HTML Files, so your clients will be able to read them and they don't any software to be installed.
Otherwise another feature that might be interesting for you is our DB Manual Console, with this small program you can automate this tasks at night.
In the morning you and your colleques will always have the lastest documentation available.
Let us know if we can help you out.
Frederik Van Lierde
DB Manual Team