I don't think there will be an issue if the root of your tftp server is \CSCOpx\tftpboot.
If in case of an issue you will get support from tac is a different question.
They may want you to reproduce the issue you have with their tftp services first.
The performance of the performance of the ciscoworks tftp daemon is not that bad
But is you think of running 2 tftp servers on the same machine, that is not possible as only one can use the port UDP 69
Cheers,
Michel