You can still find the patches on ElderScrolls, if you use the Internet Archive: http://web.archive.org/web/20080331103226/www.elderscrolls.com/downloads/updates_patches.htm
There is a difference between American and European games. So make sure you have the correct version of patches that matches your game.
If you have "Game of the Year" edition, then you don't need any Bethesda patches.
Using mods for MW is basically the same as OB (folder paths are similar,) but some of the tools are quite different.
If you're familiar with Wrye Bash, it's Morrowind counterpoint is http://www.tesnexus.com/downloads/file.php?id=27588.
http://code.google.com/p/mlox/wiki/Mlox is also helpful for sorting your Load Order.
For more info on mods, check http://www.gamesas.com/index.php?/topic/1060141-mod-recommendations-for-new-players/page__p__15392814#entry15392814 for links on community patches, and advice on tools/mods.