I've been trying to install the Lame ACM encoder on my Vista 64 bit OX but it just won't install properly. I know that I have to use a slightly different method of installing 32bit encoders on a 64 bit OS. I've managed to successfully install Huffyuv and Lagarith (both 32 bit) on my system by:

1. Opening up a command prompt by typing "cmd" in the run box and pressing Ctrl+Shift+Enter (to run as Administrator).
2. Changing directories to sysWOW64 ("cd C:\windows\syswow64")
3. Typing the following (example_path replaced with the actual path to the extracted files), then hit enter: rundll32.exe setupapi.dll,InstallHinfSection DefaultInstall 0 c:\Temp_Folder_Path\codecXXX.inf