Hi everyone.

I tried suggested in the first post connection for high-voltage programming of PIC16F877A. Programmed uC with IC-Prog, with suggested above settings.Works flowless, no problem at all.
However!
There seems to be a problem with the bootloader. If you use the bootloader for PIC16F877, it will not work. And since there is no other bootloader included with older versions of MicroCode Studio Plus, one has a problem.
So, if you want to work with PIC16F877A, you must upgrade to the latest MicroCode Studio Plus version (they have new loader files and they work with 877A), or you have to request it by email from Mecanique.

Hope this info saves somebody some time