Throw this line (it's one line) into a .cmd file and execute it. It will save your putty configuration to a .reg file to import on another machine or another installation.

regedit /e "%USERPROFILE%\desktop\putty.reg" HKEY_CURRENT_USER\Software\Simontatham

That all goes on one line. Saves it onto your desktop.

That's a definite time saver. I forgot where I grabbed that.