about plugins,scripts

im a new phbot user …
have been hearing a lot about Plugin system lately but after i bought phbot … i found it very hard to deal with.
im using xAutoDungeon
beside its “ignore mobs” which not working (but its alright since i can deal with monster preference) … i have no idea about how to benefit from it since u guys saying " scripts not allowing me to buy and use Dimensional Hole and then enter FGW " … so what is the point of plugin !!
my point is … how can i use this plugin system … since there is no single explanation to anything related to phbot (as if its secret) and people refuse to talk about it !!