scroll-conservatively & others ...

Hi all. I'm trying to make Emacs scroll one line at a time, so I've set Emacs accordingly: (custom-set-variables '(scroll-conservatively 1) ... I've also tried values 2 and 3 and restarted XEmacs every time. It doesn't seem to make any difference .. I still scroll half a screen at a time. Am I missing something? While I'm asking things .. I'm one of those people who like to keep local copies of install packages. To that end I downloaded a bunch of XEmacs packages before I installed them off the local disk. After I installed the packages, I noticed that the original files have gone! Is this intended behaviour? How do I stop XEmacs from doing this? Also, is there an easy way to allow me to use a "M-x command" to execute a script? I want to be able to do something like "M-x getmail" and have it call my script file to suck email off my POP3 server (which does filtering and some processing too, which is why it's a script). Preferably it'll be asynchronous, like the compile buffer ... I know this must be documented somewhere. If someone can point me in the right direction I'll appreciate it. Thanks for any help.