I successfully could run the Porteus OS on RAM using my live-USB stick from the boot menu. (I just selected the option and it worked.)
However, I couldn't ignore following issues with the OS running on RAM.
1. The changes (save controller) didn't copy or load on the RAM version. It started as a fresh version. What went wrong here? Did I miss something?
2. The battery icon in the task bar at the bottom didn't show the battery indicator. Upon hover, it said that no battery found. When my laptop was definitely working on battery as how else will it work. How to fix this?
3. Various fonts didn't load while browsing. While they worked perfectly normal when booted from the live-USB. What to do in this?
Please bear with me, I am not a techie.

Thanks.
Solution:
You have to add the changes cheatcode after APPEND under the RAM Mode too in the porteus.cfg file.