Can i use a USB-to-RS232 Serial converter to connect to Arduino ?

Seriously, what does any of this have to do with a board detector program?

All that I can tell from your post is that you probably don't have a current Uno bootloader installed because if you did, the hfuse should be 0xDE which says the bootloader is 256 bytes in size. 0xDA says yours is 1024 bytes.

So you're telling me you haven't uploaded a bootloader to this chip? If not, you have absolutely no idea of what that chip looks like to avrdude, other than the device signature.

Edit:
Don't bother with fuses, just burn the bootloader, the IDE takes care of the fuses.