Hi W2K/SP4 IE6 with actual Patches MF PS 3.0 Acrobat Reader V5 Acrobat Full Product V5 some of the users only have access to the Reader (AcroRd.exe) and other to the full product (acrobat.exe). I succesfully managed with help of respective reg-files to redirect users based on group membership to have either the AcroReader or the full version open up when double clicking a pdf file. What regkey do I have to change to have the same behaviour when opening pdf files from within the internet explorer? Can someone give me a hint on this? All your input is appreciated very much Peter