Yup vault hunters! You read the title right, you can claim your own Borderlands license on steam, due to an exploit to the granting tool on steam. Be quick, they may fix this exploit! Enjoy!
(Required) Get Daemon Tools Pro (trial)
Install IDE drivers and restart PC
Get the Borderlands mini image here = http://adf.ly/qiKKo
Extract the archive
Right click the *.mds file, go to daemon tools in context menu, add an IDE virtual drive and mount
(Optional) Exit Daemon Tools
Launch steam and login by clicking here
Download the Borderlands Granting tool in Steam Tools
Launch it and let it do it's work!
Have fun!!