There are two drivers as we talked about in the meeting (1) driver/bbrdb2k/sys "Modified" (only uuid, pid and vid changed) from MSFT's 2k DDK Worked fine for 98/me/2k/xp But cannot read and write at the same time(not multi-thread safe driver) To build it, install 2kDDK first Then goto this folder, type build Under driver/bbrdb2k/exe, there is a simple test program, send a "ping" command and get a reply from BB host app (i.e. usbmon). (2) driver/bbrdbxp/sys "Modified" (only uuid, pid and vid changed) from MSFT's XP DDK Worked fine for me/2k/xp To build it, install xpddk, then type build in this folder. (3) shell and mux shell and mux only worked with (2) driver, since we need multiple-thread to handle read/write for RDB protocol. You need Visual C++ 6.0 to build it.