Hello,
i would like to present you online converter+hosting for hacks reports:
http://dotabot.net/bots_webpages/converter/index.php
Just click on BROWSE select .tga screenshots for your report and click UPLOAD.
After a while you will get code which you can directly paste in your report.
This will surely save your time because its converting & uploading in one shot.

Regards,
Eurobattle crew