Ok... Lets see if I can't help you guys out any... First i'll give you the links to the downloads you're going to need if you feel like tweaking the modem.
What you're going to need.
1. Odin
2. SDK
3. The Lagfix Script
So let's start with number 1. Here's the Download.
Click
Here to download Odin3 for Samsung Epic.
Click
here to download the modem.bin and PIT files.
As for use of Odin, It's actually a lot easier than it seems. I'll give you a quick runthrough.
1. Download and extract Odin, as well as the Modem and PIT files. (You DO NOT flash the ROM through Odin, The ROM is flashed through Clockwork.)
2. Open Odin. At this point, you have to put your phone in download mode. To do so, simply hold the number 1 on the keyboard, and the power button at the same time. Once in download mode, plug the USB cable into the phone. Only plug the phone in AFTER Odin is up and running or Odin won't pick up the phone.
3. Navigate to where you downloaded the modem and pit files and place the PIT file where it says "PIT" and the modem.bin file where it says "phone".
4. On the left side there is an options box. Make sure that "reboot" is the
ONLY thing that's checked.
5. Now you're ready to flash the new modem. (Remember, the modem does NOT need to be downloaded, it's just a bonus feature) Hit start and allow it to run through it's process. When finished, the block above the port that your USB is showing will turn either green or red for pass or fail. At this point I haven't heard of anyone failing.
When Odin is done doing it's thing, it will automatically reboot the phone for you. Then you're setup with the new modem!
Now, on to SDK.
Here are the download links with their respective systems.
Download SDK for windows
HERE
Download SDK for Mac
HERE
Download SDK for Linux
HERE
Instructions for installing SDK to your computer...
1. Download one of the SDK kits from the links provided above and extract it.
2. Install it to somewhere that will be easy for you to access. I have placed my sdk folder in "my computer" so when i start the command prompt i can type "C:/sdk/tools" and it takes me directly to the sdk folder.
3. Next we're going to set a PATH for you. This is how it's done on windows, i'm not sure how to do it on the other platforms, but i'd imagine it's not that different.
4. Open the start menu and RIGHT click on "my computer" to bring up the right click menu. Then click on properties. When the box opens, on the left side there are some options listed. Click on the bottom one that says "Advanced System Settings".
5. When that box pops up, at the bottom there is an option that says "Environment Variables"... Click on that.
6. Now you will see two text fields. One on top of the other. You're going to click on "new" on the BOTTOM box. To make sure you're in the right one, it should say "system variables." Now it will ask for the name, and you can type in whatever you want. I've typed in SDK for ease.
7. It's also going to ask you for the variable value. This is where you're going to type the path to where you put your SDK kit. Mine is "C:/sdk/tools"
8. Now you have downloaded and installed SDK and created a path for it, it's time to use it to type the lagfix. Open your command prompt from the start menu.
9. Follow the instructions given above in the OP to install the lagfix.
I hope this helps for everyone. If you need anything else, just let me know.