jack WROTE:According to sich, since i can eliminate the line following part, there is no need for me to install the IR sensor right ?
Yes, but you better test the complete robot set with the sample source code provided. Otherwise you don't know whether there's any mistake. If it cant work properly, you shouldn't proceed with your modification.
jack WROTE:What is the CCPR value and how am i going to change the value ? Is it in the programming part ?
Yes, it's programming part. Refer the PIC's datasheet, section Capture/Compare/PWM Module. The sample source code should have comments that helps you to get started too.
jack WROTE:If i dont want to use the robot set RC servo motor, what kind of motor that you all recommend for me?
Any standard brushed motor that can fit into the robot base and provides enough torque n speed for your application. You can search for "SPG-20" or "SPG-30" in Cytron's website. If you are using SPG-30, you can purchase the coupling from Cytron and the setup will look like "HD-BSC-SPG-G". For SPG-20, we don't have coupling for it. You need to make your own.