KitProg2 (CY8C5868LTI-LP039) is the onboard programmer/debugger and supports only Cypress-developed Kits. It will not work (may, but no guarantee) with any custom hardware or with Cypress Kits customized for different MPN. You can use any of the following three programming methods:
We have PSoC 4 HSSP code example project available here. Please use the PSoC Creator project and follow the code example document. Since CY8CKIT-146 4200DS has KitProg2, please refer section: 'For Kits with Onboard PSoC 5LP Programmer (KitProg2)'.