Got DotA 2 but you want to see the icons or hear the sounds outside the game?
you can extract it using this tool
Visit the main website
http://growlanser.blogbus.com/logs/163372159.html
Mediafire link
http://www.mediafire.com/?z5v8djpc73t79l
Same as Blizzard (mpq) , Valve also has their own name for compressed file called VPK
VPK ("Valve Pak") files are uncompressed archives used to package content (never code). They are the successors to GCFs, and when passed to the addoninstaller tool are also used to distribute add-ons like custom campaigns.
How to Extract:
place run.cmd and dota2_extractor.exe under the installation folder of DotA2 beta
then run run.cmd.
If the operation is correct, the extracted resources will appear under a new folder named output_dir.
Inside the output_dir folder will be the images,icons,models,sounds and other stuff used in DotA 2
Enjoy and have fun
Credits to growlanser for his awesome tool