Custom threads titles in forums by ID

[Przemoo]

Hi.

When i had 3.8.5 i was able to add custom titles to each thread in specifics forums.
I remember that i was changing something in showthread by adding some code with the id of forum and custom title. i want that to be like:

thread title - "Custom threads titles in forums by ID - custom title"
thread title - "Vb4 Gold Released - custom title"

Can u guys tell me or remind me the code for that ;>