What kind of .tga files? Have you tried 24-bit instead of 32-bit?
Also, are you conforming to their Archive Structure?
http://modding.companyofheroes.com/asset-pack
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#Steam AliasWL%Streak
- 1.817139.855+5
- 2.47970.872+3
- 3.1109398.736-1
- 4.420217.659-1
- 5.377196.658+2
- 6.432301.589+1
- 7.11730.796+4
- 8.1347748.643+1
- 9.12957.694+9
- 10.341122.737+2

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