Dhoom 1 Tamil Isaimini -
I'm assuming you're referring to the movie "Dhoom" (not "Dhoom 1") which was released in 2004, and it's an Indian heist action film. The movie was not originally released in Tamil, but I think you might be referring to a dubbed or pirated version.
To conclude, while nostalgia is powerful and convenience is tempting, using Isaimini is a losing battle. Here is a quick summary: Dhoom 1 Tamil Isaimini