It looks like there are some hard-coded paths (c:\ti) in the generated examples. You can re-generate the examples with the following steps.
1. edit the tirtos.mak to have the correct paths to compiler, CCS and the installed TI-RTOS and enable IAR.
2. Run the ..\xdctools\gmake -f tirtos.mak examplesgen to get help on how to setup the destination path.
3. Delete the custom arg you had already imported and add the new one.
Now try importing an example and building.
Of course you could also just install the product into c:\ti.
Please let me know if this works so I can write-up the bug report properly.
Thanks,
Todd