If the install program did not modify your autoexec.bat file, you will need to add "command /e:2000" in order for WEPP to run. Likewise, if the install program did not modify your config.sys file, you must set buffers=10 and files=50 as a minimum. There is one more thing that you must check in your config.sys file. The NOEMS option for the emm386.exe device must NOT be used. Use device=c:\dos\emm386.exe ram, instead. WEPP will NOT run with the NOEMS option. If you want to install more state climate and map files at a later time, you need only to run install again. Install will not erase any files or write over existing program files with the same dates. You can view this text again within the file "newinfo.txt" which is located in the main WEPP directory which you designated during installation (Default=c:\wepp). To start the WEPP program, change to the main WEPP directory and type: HILL to begin the Hillslope Interface Program SHED to begin the Watershed Interface Program