The best way to get started is to go to POI-Factory.com and sign up with an account. Here you will find alot of different POI files to choose from. You can contribute to the files also if you like.
Also you will need Garmin POI Loader which is free form Garmin.

First get your computer to boot just in Windows (single boot).
You have two options:

1. Boot into Windows Recovery Console via your XP CD and run “fixmbr” to clear the master boot record (this is where Lilo or Grub is kept).

OR

2. If you can find a copy of a Win9x/ME boot disk, that will work too. You just have to type “fdisk /mbr” at the DOS prompt instead of “fixmbr”.

Once you do this and boot straight into Windows, simply right click My Computer, select Manage, go to Disk Management, and delete the Linux partitions. Then use those partititions for whatever you want or merge them back into your Windows partition with Acronis Disk Director or Partition Magic.

To unregister DLL files, you need to do the following steps:

1. Open a Command Prompt window.
(click Start > Run and type “cmd”)

2. After you have opened a Command Prompt window,
locate the DLL on your pc. ( C:\BadDLLFolder>)

3. Unregister the bad DLL in the BadDLLFolder
( C:\BadDLLFolder>regsvr32 /u Bad.dll)

4. Should get a message of a successful unregistered DLL.

To register DLL files, you need to do the following steps:

1. Open a Command Prompt window.
(click Start > Run and type “cmd”)

2. After you have opened a Command Prompt window,
locate the DLL on your pc. ( C:\GoodDLLFolder>)

3. Register the good DLL in the GoodDLLFolder
( C:\GoodDLLFolder>regsvr32 Good.dll)

4. Should get a message of a successful registered DLL.

1. Short one end of the coax.
2. Connect the other end of the coax to the MFJ-259 input.
3. Turn on the MFJ-259 and start at the lowest frequency range. Watch the RESISTANCE METER for a dip reading (zero ohms) and record the frequency.
4. Continue moving up in frequency to find a second dip, which should be twice the first (recorded) dip frequency.
5. Calculate the length: Divide 492 by the first dip frequency (in MHz) and multiply the result by the velocity factor of the coax cable being measured. The result should be in feet.

1. Connect the coax to the MFJ-259 input.
2. Turn on the MFJ-259 and start at the lowest frequency range. Watch the RESISTANCE METER for a dip reading (zero ohms) and record the frequency.
3. Continue moving up in frequency to find a second dip, which should be twice the first (recorded) dip frequency.
4. Calculate the position of the short: Divide 492 by the first dip frequency (in MHz) and multiply the result by the velocity factor of the coax cable being measured. The result should be
in feet.

1. Disconnect both ends of the coax and measure the physical length of the line in feet.
2. Find the lowest frequency across all the bands at which the lowest SWR occurs.
3. Read the frequency from the frequency counter display. This is the 1/4 resonant wavelength frequency of your coax. Note that you will get low SWR reading at all odd multiples of 1/4 wavelength.
Example: On a 27 foot line the measured frequency was 7.3MHz.
4. Divide 246 by the measured frequency. This gives you the free space 1/4 wavelength in feet.
Example: 246 divided by a dip frequency of 7.3 MHz is 33.7 feet, the free space 1/4 wavelength
5. Divide the physical measured length of the coax in feet by the free space 1/4 wavelength calculated in number 4.
Example: 27 feet (physical length) divided by 33.7 feet (calculated length) equals .80 . The velocity factor is .80 or 80%.

Free space 1/4 wavelength = 246 / Low SWR frequency
Velocity Factor = Actual feedline length / Free space 1/4 wavelength

(Taken from http://www.aprs.net.au/aprs_ssid_guide.htm)

Before connecting to a server, uncheck all servers you have previously selected. Then press INSERT and type in the server you wish to connect to. I use "aprsfl.net:14580" and also "third.aprs.net:14580" - click them both. That way if one goes down, you can rely on the other.

If you wish, just use ONE server called "rotate.aprs.net:14580". This will rotate you through first, second, third and fourth (aprsfl) depending on the server load.

For a list of filtering parameters, go here:
http://www.aprs-is.net/javAPRSSrvr/javaprsfilter.htm

For a list of ports, go here:
http://first.aprs.net:14501/

Now that you have your APRS server set up, go to menu "Setup - Station Setup".

Enter callsign and coordinates. For your symbol, if you want to use an I-Gate symbol, scroll down and use "No’ Diam’d" and put a capital "I" in the O’ly. This will make you show up on the map as an I Gate.

Under Beacon comment, you may want to say something like "W4JCB @ Home - I-Gate".

Now under the main screen, select "Options", and at the bottom "Show I-GATE Traffic".

Go back to main menu and select "Action" menu. In the dropdown, select "Connect to APRS server", then click "yes" to log on when connected.

Now, everything you see on the "Traffic gated from RF to the Internet" will be gated to the server.