Hi Some time ago I got client SharePoint server to do some small things on it. Mainly client was askin me to install some 3'th party webparts and other solutions. So basicly I was checking them on my developement machine, before istalling theme on the client server. Back i those days, I didn't know that it's necessary to make copy of that solutions, and now I have server with a lot of 3'th party solution installed on. How can I got this solutions back? Are they copied somewhere in the 12 directory during installation?

SharePoint stores solutions in a database. Try Solution Extractor http://code.msdn.microsoft.com/SPSolutionExtractor/Release/ProjectReleases.aspx?ReleaseId=3219Oleg