I believe there is no special Scholarships available for HD student at Pilani.
However you can get a Teaching Assistant Job available for computer science students which could be quite handy. I worked as TA for a Lab for a semester and WILP (Remote Learning Program) TA for other 2 semesters. Its a pretty nice job and not that taxing and you can finish the WILP job by spending 4 hours a week on an average.
However with my GATE score and by the tireless efforts by some of my batch mates (there were a couple of people who worked very hard for this and had gone to court to get some settlement) I was getting a UGC grant for each semester. You can apply for that (if its still the same policy for UGC), but the payment will be delayed for 1 year – 3 years for after each semester. But its still worth it.