I know this is old, but it's possible to port any griptape/deck to THAW, as described here
WhoElseButMe wrote:they are dxt compressed
change the img header to a dds header and get the dxt plugin for photoshop
edit, save, change header,add to game
The tool only works on linear imgs NOT on compressed imgs
Demo wrote:dxt is a compression type used in both dds and img files. he meant you have to change file header in hex to make a DDS file out of IMG file, then open it with any program which supports DDS files, edit it? save and make same thing in hex but backwards. not sure if it actually cleared it up.
The converters for THPS4 (These only work for THPS4-THUG2, for THAW, read the above method) right here
, You can use any photoshop program that supports DDS and TGA to open them (Paint.NET will work, and it's free), Soon, there's going to be a THAW decks/griptapes mod that adds THPS3-THP8 Decks/Griptapes as gone said in that topic