To upgrade an earlier TWiki version like 
01 Sep 1999 to version 
01 May 2000 you should do the following things:
-  Back up your system.
 
-  Update the templates in the 
/templates directory (and its subdirs):
-  Take the templates of the latest distribution as the base and merge your changes back into it.
 
 
-  Update the Perl scripts in the 
/bin directory:
-  Take the scripts of the latest distribution as the base and merge your changes back into it. Do so also for 
wikicfg.pm because it has important changes as well.
 
 
-  Update topics:
-  Copy the new Main. TWikiPreferences? topic (and 
*,v file) into your TWiki.Main web. Customize the topic to your needs.
 
-  Copy the new Main. WebPreferences, WebStatistics topics (and 
*,v files) into all your webs. Customize all WebPreferences topics to your needs (e.g. web color).
 
-  Copy WebSearch into all your webs, or modify the existing ones. Reason: Some switches for search changed.
 
-  Copy the TWiki documentation into your Main web: Topics TWikiDocumentation, TWikiUsernameVsLoginUsername, TWikiVariables, TWikiNotificationOfChanges?, TWikiCategoryTable, TWikiImplementationNotes, TWikiInstallationNotes?, TWikiUpgradeTo01May2000, TextFormattingRules, TWikiHistory .
 
-  Copy the registration topic into your Main web:
-  In case you are on an Intranet: Copy topic TWikiRegistration to Main.TWikiRegistration. Customize if needed.
 
-  In case you are on a public server: Copy topic TWikiRegistrationPub to Main.TWikiRegistration. Customize if needed.
 
 
-  Copy the Main. TWikiWebsTable topic (and 
*,v file) into your Main web and customize it. Reason: The new release does not use the *.inc include files anymore.
 
-  Optionally: Search for 
%INCLUDE%'s in all your webs and change them to the new %INCLUDE{"file.ext"}% syntax. Note: Your old %INCLUDE:"file.ext"% syntax still works (the legacy rule is defined in wikicfg.pm .) 
 
 
-  Add the PoweredByTWikiLogo to your netfrag.org home page.
 
-- 
PeterThoeny? - 28 Apr 2000