1. Android buid
  - Download original android source code (froyo ver:2.2.1) from http://source.android.com                    
  - Untar opensource packages of Thunderc_Froyo.tar.gz into downloaded android source directory 
  - And, merge the source into the android source code(froyo)
  - Run following scripts to build android                          
    a) . ./build/envsetup.sh                                         
    b) choosecombo 1 1 generic 1                                     
    c) make -j4                                                      
  - When you compile the android source code, you have to add google original prebuilt source(toolchain) 
    into the android folder 
  - After build, you can find output at out/target/product/generic  
  
2. Kernel Build
  - Untar using follwwing command at the android folder
    	tar zxvf Thunderc_Kernel.tar.gz
  - cd Kernel
  - make thunderc-sprint-perf_defconfig
  - make

3. After Build, You Can find the build image at arch/arm/boot

4. In case of dosfstools related to GPL3 License, you can build the source according to the readme file which is included 
  in  doc folder. And, you can install the image file by using adb push command.
  you can refer to this site, https://launchpad.net/ubuntu/+archive/primary/+sourcepub/641242/+listing-archive-extra or 
  http://developer.android.com/index.html



