GpProfile works with Delphi 2, 3, and 4 in any flavour (Standard, Professional, and Client/Server).
GpProfile runs on most operating systems supported by Delphi (Windows 95, 98, NT 4, NT 5).
You will also need a lot of disk space (recorded data can easily consume couple of gigabytes). A fast computer is also recommended.
I do all the testing on NT 4 Workstation with Delphi 3 and Delphi 4. Other combinations are not thoroughly tested.