It should be noted that after installing windows XP SP3, the script encoder, screnc.exe, will not work. You will continue to get an error like "screnc.exe has encountered a problem and needs to close. We are sorry for the inconvenience."
AppName: screnc.exe AppVer: 0.0.0.0 ModName: msvcrt.dll
ModVer: 7.0.2600.5512 Offset: 00036fa3
This error will only occur when actually trying to encode a script, simply running screnc.exe will not cause the error. I don't see MS fixing this error any time soon, so if you need the script encoder, you will have to skip SP3, or have a VM handy that skips SP3.