Hello JSmith,
Basically you are using the ZPX (Zap-Fix) based testing scripts with LR (Load-Runner) the same way you use any other QTP based scripts:
This is because ZPX is an Add-in to QTP, and ZPX based scripts are eventually QTP based scripts.
P.S. These days Zap starting to publish the ‘ZAPGEN’ application which behaves just as the LR, it allows you to execute any QTP and ZPX based scripts as load test (Performance testing) on any platform (Including all mobile devices) and on any cross-platform Browsers and Devices.
Please check our latest ‘ZAPGEN’ page at:
http://www.zaptechnologies.com/products/zapgen
Thanks,
Sasha