If you do not know how to transfer the files to their appropriate directories then this is my attempt to help you -
First, I was like you just yesterday so don't take me to be an expert, just stubbornly willing to read for hours about things I don't understand.
I just discovered that the version of iBrickr that I used for freeing my iPhone (version 0.91) does give access to the file system on the iphone. Click on "files" and you get a file manager where you can navigate, create folders, upload files and delete some files. It won't let you delete certain files, which is probably good except that if you click on one of these files you get an oddly placed download option and no way to back out of it besides closing iBrickr.
I used WinSCP (windows) to transfer the mod files from this thread. I used
the instructions at
http://www.hacktheiphone.com/74/ipho...indows_74.html for setting the phone up with what it needs to work with WinSCP - installed AppTapp, OpenBSD Subsystem, OpenSSH, and Ulctl. Then moved on to
http://www.hacktheiphone.com/74/ipho...indows_74.html and did everything on that page for downloading and using WinSCP.
From what I understand, OpenSSH is to make the phone a server and WinSCP is to interact with it which allows you to access the file system via wi-fi.
There is a simalar method for OS X outlined on this site here:
http://modmyi.com/wiki/index.php/Usi..._X_with_iPhone
Hope this helps.
Installed iVolume 1.2 = dial pad very loud
Installed iVolume 1.3 (skipped iVolume1.2_NormalDialPad) = headset volume much improved, but overall sound quality suffers from static, maybe was already like that I really hadn't done much testing other than discovering the headset volume was way too low after unlocking. At least that is fixed. Very happy about that

Headphone volume is way too loud when turned all the way up (headset requires full volume, but then it is plenty loud). No big deal it's easy to turn down with the volume buttons. Headphone sound quality does not suffer from static. Most importantly, thank you very much helping me make this thing usable as a headset.