Since I’m just a common user of the Linux server, I don’t have right (because I’m not strong enough to take the responsibility of any damage caused by the update) to update the CUDA 4.0 to the new CUDA 5 which contains the wonderful Nsight IDE. So, is it possible to just install Nsight on CUDA 4.0? Thank you.
This is not possible.
Nsight will run if it is simply copied to another system - but it relies on some new features and bug fixes in compiler and cuda-gdb that are only available in CUDA toolkit 5.0. You may be able to set up compilation (e.g. if you avoid separate compilation and such) but debugging will most definitely fail. Profiling would also not work as it uses nvprof introduced in 5.0.