Sorry for the late reply, Managed to get a userlandFS environment ready. I'm trying to port over a FUSE filesystem which I had written in the past, however not been able to make much progress due to lack of documentation among other things. :( I wanted to have a look at the IMAP implementation for the mail client. @Clemens can you give me the link please? Currently I'm studying the code for NetFS which is closest to what we are trying to do here. Preliminary Query : I'm assuming the code for netfs given here: http://svn.berlios.de/viewcvs/haiku/haiku/trunk/src/add-ons/kernel/file_systems/netfs/is using userlandFS and is not the kernel level code. Is that right? . It would be helpful if you can point me to the person involved with developing netfs as i'm going to have a lot of questions about that. I will post again with queries as and when I get them. Thanks! Anshul