I have a patched version of tcpip.sys which enables 100 concurrent connection ports and I want to put it in my REPLACE\i386 folder. There could be a problem with this patched version of tcpip.sys in the installed XP being replaced when I run System File Checker. I assume that the file size would no longer tarry with the information in a security catalog. I wonder if there are addons for patched system files that would somehow make XP perceive them as legitimate and not be rejected by WFP. For instance, there is an addon offered at the RyanVM forum to allow the integration of patched dlls into XP to enable software Raid-5. I wonder if this would work with HFSLIP, the RyanVM Integrator and nLite, and would it resolve WFP problems. You can obtain it here: http://www.ryanvm.net/forum/viewtopic.php?t=713 Name of file: Rikgale_XPRAID5_addon_v1.cab