I still use RVS_2008 because as far as I know it's the last version to allow ONLY memory caching, which is how I want it as I use it for privacy and don't want to have to worry that traces might be lingering in a file RVS has created somewhere. However that brings up a couple of questions that I've been meaning to ask about for a while. Firstly, I can imagine that it doesn't take much memory for it to track deleted files, as it only needs to store a marker to pretend the file is deleted, but how does it cope with a file or files being written to the system partition that is larger than can be cached in memory? It's not something I'd ever want to do, but I guess I'd like to know if I should expect it to crash in those circumstances! Secondly, even with memory caching it still creates a RETURNIL folder with a RVSYSTEM.DAT file in it. I can delete that file and it still seems to work, but it gives an error every time I boot. So, what, if any, purpose does that file serve if the user's only using memory caching?