Update for Czech translation. Contains language files for both ffdshow and installer. custom_messages.iss contains only Czech strings and is in CP-1250, so it needs to be merged with the rest, hopefully InnoSetup 5.3 with support for UTF-8 .iss files will be out soon, so we will get rid of encoding problems.
Sorry for late reply.
Please send a whole custom_message.iss.
I can't edit that file without breaking the encoding.
Uploaded complete custom_messages.iss.
Thank you. I have committed as rev 2937.