Different LiteSpeed msi files are available on the Quest SupportLink download site. What is the difference?
The LiteSpeed for SQL Server Enterprise msi is a ZIP with the LiteSpeed Engine product. Since it is only available for Enterprise license, it has been included and ZIP it up for the customer. It is the same installer as LiteSpeed standalone. If a customer wants to use the Engine and have the license for it, they download the Enterprise Edition. In that location is the LiteSpeed installer and the LiteSpeed Engine istaller.
Each version, LiteSpeed for SQL Server and LiteSpeed for SQL Server Enterprise, will have downloads to 32 bit, x64 bit, and Itanium 64 bit.