basics about current compression tools ?

[joekkerr]

so finally after months of reading this forums and a very helpful member, i am able to understand good few things. Yet i have some doubts

I downloaded lots of files that had pack & unpack folders with arc.exe in it, by studying the command lines posted in many posts i realized that freearc is now used as sort of a batch file, as in its used to use other tools too. eg: precomp, srep, lolz.

So here's my first question : I downloaded all the individual files (maybe all) and i understood arc.ini is used to configure the other tools that are meant to be used with freearc, i.e options for those tools are added in arc.ini.
Where can i find all the dll files that are used by freearc i have individual files but i dont know if those dlls & exes will work with freearc.
Can anyone upload theirs ?

second question : With a pattern of pack unpack and arc.ini, i feel you guys dont need to pack 1 thing at a time as now freearc does everything for you.
eg. first it was single thing at a time precompress then srep then freearc
now is it that you just dump the files to be compressed in pack folder you created and run the batch file that calls freearc with commands in arc.ini? I understand by doing this easens the entire process

third question : if my 2nd question's assumption is correct, how does freearc decompresses it ? while decompressing will i have to add the exes & dlls of other softwares (xtool,pzlib,etc) to the repack ? Does freearc knows automatically the decompression order ? eg. if its a pcf file thats srepped and then arc'd, will free arc decompress in order?