The IE language, if it was a single language, is lost to history. It is a reconstructed language. Those linguists who are on the Internet have found the Internet to be a most powerful tool for linguistics research since graphics and sound files can be shared instantly and throughout the community. Progress is coming quickly. If Blam posts an image of an ancient starchart or inscription just discovered in China or Egypt, the whole linguistics industry has it immediately, so that if one scholar recognizes something, he can pass the knowledge on to everyone right away. So now the attention of all linguists on the Internet, which is nearly all linguists, have their attention drawn to Welsh-Hindi right now.
If you read about any 'break-throughs', let us know.