Thanks for your replay.
I'm using PBP and MicroCodeStudio, works great with my PIC16F874(A), but I will uppgrade, for more memory, to 16F877A. But I can't find any bootloader for 16F877A in MicroCode folder, where I found the bootloader for 16F874A.

Thanks
Håkan

Ps. there is one for PIC16F877, but not for 16F877A