PerformanceTest can be setup to be portable and run from a USB flash drive. To do this you first need to install PerformanceTest in the normal fashion to a fixed hard drive. Once installed you can then also make an additional portable copy.
From within PerformanceTest use the menu option "File"->"Install PerformanceTest to a USB drive".
From the "Install PerformanceTest to a USB drive" window, you need to specify:
When you select install, PerformanceTest will create the directory on the USB drive (e.g. F:\PerformanceTest), copy all of the files from the PerformanceTest directory (e.g. C:\Program Files\PerformanceTest) to the USB drive (e.g. F:\PerformanceTest) and install the license information onto the USB drive.