Slimtex Macros

Was wondering if someone could tell me the macro settings for converting car tga files to tex files in Slimtex please.
When I click on the Macro function the only option I get is to configure new macrps.
Have tried re-installing ZaZtools but still no macros appear in the list.

These are the options I get for setting up a new macro :

Format
Compression
Transparency
Width
Height
MipMaps
Flip
Mirror
Prefix

Thanks,
Ba1dy