.pac/.pcs - Both, neither or none?

[Axapez]

(considering that I'm new here, this might be the wrong place for this, but it seems like it'd be the right area for it, bear with me if I'm wrong)

Okay, here's  a problem I've been having for a while.  Whenever I want to download a texture of some sort, there'll be two files to be downloaded - fitXXXXX.pcs or fitXXXXX.pac. Nothing out of the ordinary there, I've seen them for stage textures, movesets and whatnot. The thing is, the game will usually crash after a match is over when I have a character texture enabled upon returning to character select after a match is over.
Now, oftentimes when I get to the download link of a texture, there'll be both the pcs file and the pac file. Am I supposed to place both files in the folder, or is there a specific file to go in one area?

[Pin0yB0i]

Only these characters need it's .pac file.

Code:

Samus/ZSS
Zelda/Sheik
Pokemon Trainer
Bowser
Wario

For more info, go the the second post of this thread.
http://www.smashboards.com/showthread.php?t=232455

[mnsg]

Some characters require both their PCS and PAC files, just like PiN0yB0i stated.  This mostly applies to transforming characters, including Giga Bowser and Wario-Man.

Regarding game crashes, some of the hacks on the Brawl Vault have their fair share of glitches, especially the character imports.

[DarkPikachu]

the pac is the file that is accessed when fighting master hand,
or in adventure mode... (I believe)
and for an online match (this gets complicated):

lets say we have 2 players (over the net)
you use the char's pcs file on your wii (your hack), but...
you use the char's pac file on their wii... (their file they're using on their wii)