[Skunkworks] ubuntu system restore=>SOS

Hi all, I did something wrong in ubuntu 10.04 server and I need to undo the changes made by installing unwanted package+dependencies. So my question is how does one do a "system restore" in ubuntu server. Removing-purging tht particular package+dependencies wont help,damage already done. Yes i have googled for the last few days but the solutions an getting is for restoring from a backup. What am looking for is/are way(s) of rolling back to previous day before the package+dependencies was installed. Remember this is a server so no GUI. SOS. Rgds.