hi,

Finally, somehow I lost your problem in the whole.
Could you explain once again, please?

As it was indicated by you, project uses AT89S53. You said as well that Franklin does not support simulation. You did not say before that it does not support compilation too. If your IDE does support neither compilation nor simulation then I may suggest you only:
- use MCU which is supported with Franklin;
or
- use IDE which supports AT89S53; for example - Keil.

Indeed, you may write program for AT89C51/C52 and then compile it for C51/C52. Finally, you may download program into AT89S53 chip. Looking on SFRs` maps of C52 and S53, I may say that probably such program will work as long as it does not change some S53 specific SFRs accidentally and if your external hardware is compatible with S53 (especially reset circuit). But I do not recommend you to do by so bad way. See what I suggested above.

Regards,
Oleg