Is there any way of throttling CPU/Memory of a process?
The platform SDK used to come with stress tools for doing just this back in the good old days (STRESS.EXE, CPUSTRESS.EXE in the SDK), but they might still be there (check your platform SDK and/or Visual Studio installation for these two files -- unfortunately I have niether the PSDK nor VS installed on the machine I'm typing from.)
Other tools:
- memory: performance & reliability (e.g. handling failed memory allocation): can use EatMem
- CPU: performance & reliability (e.g. race conditions): can use CPU Burn, Prime95, etc
- handles (GDI, User): reliability (e.g. handling failed GDI resource allocation): ??? may have to write your own, but running out of GDI handles (buggy GTK apps would usually eat them all away until all other apps on the system would start falling dead like flies) is a real test for any Windows app
- disk: performance & reliability (e.g. handling disk full): DiskFiller, etc.
AppVerifier has a low-resource simulation feature.
You could also try setting the priority of your process to be very low.