I've also have found another ways to crack RedShift without a keygen.
1. To run RS5 without the cd in the drive, make a image file by using Nero
  or Alcohol 120% then use a virtual drive to install it and run.
2. To import new objects use Windows Enabler (attachmant file) then goto
  Objects\Add/Edit Objects\Select a object\Import(click twice)\Internet.
3. To update RS5. Download RS5 UK Update from redshift home page
  (http://www.redshift.de/gb/up/updt905000000.htm) Run RS5, goto help
  then Product Activation and Enter the serial number 11111-11110, click
  Manual then Close and Exit RS5, now run the new Redshift update.
P.S. If you using eMule or eDonkey the serial number RSH3854AF from DIGISO is fake...