neewbee questions for those who knows how: >>Please Help<<

1. How will i know the version of may psx4m-gui,psxreamrned and other core and support sysmtem prog installed to n900?
2. How to update theses programs psxrearmed, psx4m and others using x-term step by step?
3. What are the programs that may conflict for installing/updating the current system progs?
4. What are those programs that should i download/installed in order to update, install, run the psx4m-gui?

thanks in advance. sorry for my nood questions