Hi,
Let's say your download is to user's home directory '~/Desktop/downloads/testing';
Code:
From terminal command line(cli);
~$cd ~/Desktop/downloads/testing
~/Desktop/downloads/testing$tar -xvf tar -xvf DPO_RT3562_3592_3062_LinuxSTA_V2.4.1.1_20101217.tgz
~/Desktop/downloads/testing$ cd DPO_RT3562_3592_3062_LinuxSTA_V2.4.1.1_20101217
~/Desktop/downloads/testing/DPO_RT3562_3592_3062_LinuxSTA_V2.4.1.1_20101217$ pwd
/home/tom/Desktop/downloads/testing/DPO_RT3562_3592_3062_LinuxSTA_V2.4.1.1_20101217
Notice the last command ' pwd (print name of current/working directory)'. You are now in the directory to continue the instruction(s) an use 'nano' on the configuration(s) files and then perform the make(s).
HTH!