Export to STL with textures?

[David Saber]

hi!
I'm trying to create an STL file from a Softimage model that has targa 
textures.
I've tried :
Soft > export to STL via the plugin > import to Meshlab > textures don't 
show up
Soft > export to OBJ > import to Meshlab > error message saying "failure 
loading textures"
Soft > export to Collada > import to Meshlab > error message saying 
"failure loading textures"
What's the matter? is it Meshlab not reading targas? Or is there a trick 
I should know to export textures from Soft?
Thanks,
David