is it possible to use the hardware serial port and a software serial port at diffrent speed at the same time. im thinking of using the hardware serial at 250kbaud and the software at 9600 baud.
It's possible to run the hardware and software serial at different speeds.
However I don't think you're going to get 250K out of the hardware UART. Particularly if you intend to use the software serial simultaneously. Software serial cannot receive asynchronously and blocks will lose data if you are not blocked in a receive request. Also it's very sensitive to timing and using the hardware UART at high speed will probably disrupt it.
You may want to look at NewSoftSerial which is an improved version that uses hardware interrupts to receive data. It works at higher speeds and will coexist better with the hardware UART.