Vimala,
This files do not sound familiar as TI-supplied files. From where did you get these files?
If they are not from TI-supplied libraries, then they will of course not be provided with CCSv5, either. You will need to copy those files from your CCS3.3 project folders to your new CCSv5 project folder. You can always try the Import process, but be sure to look for the error log files to fix anything that does not import well.
I have seen vectors_intr.asm mentioned on the forum before, so it must have come from a popular source outside of TI. You should search this forum for that filename to see if anyone has done this before and documented it. Also, you should search this forum for anyone who has tried to migrate from CCS3 to CCSv5 for the examples you are using, if they are popular ones.
Regards,
RandyP