Yep, I am still not completely sure if ISAPI_Rewrite will handle all of the directives/security code in the BPS htaccess files. Looking at the Reference link below I see the most of the general htaccess directives are supported, but what I do not know for sure is how "deep" that compatibility goes. Every directive that BPS uses in its htaccess files has a "green" indicator/status, which means fully supported/fully compatible. The only way to know for sure is to actually do a hands on and see what happens. ;) Please keep me posted on this as I am very curious to know if everything will just work or if tweaking is necessary or it does not work. Thanks.
Going by the System requirements it looks Server based only, but I could be interpreting that incorrectly. But if you control the Server then this would not be a problem in your case. ;)
ISAPI_Rewrite can be installed on the following operating systems:
Windows 2000 with IIS 5
Windows XP with IIS 5.1
Windows Server 2003 with IIS 6.0
Windows Vista with IIS 7.0
Windows Server 2008 with IIS 7.0
IIS should be installed on the operating system before installing ISAPI_Rewrite.
Both 32 and 64 bit versions of Windows are supported, but you need to download distinct installation package for 32 and 64 bit versions.
Windows Installer 2.0 is required to run installation program. You can download last version of Windows Installer from the Microsoft website.
On Windows Vista and Windows Server 2008 installation of ISAPI_Rewrite also requires following modules, not installed by default: