Chads Star Wars 1.04 was released 3 years ago around Christmas time. You do not have it running on your game if you have owned it for 5 years. Here is the changelog. Maybe John Wart still has roms that you can purchase.

**************************************************************************
* *
* STERN PINBALL, INC. *
* (C) COPYRIGHT 1992 - 2012 STERN PINBALL, INC. *
* *
**************************************************************************
* *
* STAR WARS *
* *
**************************************************************************

HELP US, HELP YOU! If you have any suggestions, questions, need
technical advice, find errors or have comments, please contact us through
our website:

http://www.sternpinball.com/contact.shtml

or call 1-800-542-5377. You can also e-mail [email protected] to
report any software and/or game-related problems.

This text file and all other documents relating to this product,
playfield components, features, rules, programming and operation are
subject to change without notice (Service bulletins, if applicable,
available through our website).

V1.04 - December 19, 2012
=========================

- Added Freeze (ball save) on a 10 second timer.
- Ramp no longer collects Force Award.
- Climbing ramp bonus reduced.
- Relite Force Award via ramp normalized to every 5 shots.
- Lite Extra Ball ramp count logic changed.
- S in STAR WARS no longer spotted at beginning of ball
- Pop Bumper Sarlaac Value increased.
- Jabba Scoop will award Sarlaac Value plus Jabba Award when lit.
- Relite Relaunch logic now based on current ball time.
- Hitting Drop Targets bank once will relite Left Orbit when required.
- Chance to attain Extra Ball via Force Award increased.
- Required number of Pop Bumpers to collect AT-AT Walker mode reduced.
- Dark Side shot requirement increased.
- Shoot The Death Star remains active if was active during ball drain.
- Initial Tri-Ball Jackpot value increased.
- End Of Ball Bonus awards and maximum increased.
- Default high scores lowered.
- Combo and Super Combo awards increased.
- Sound calls added to Combo and Super Combo.
- Skill Shot audio stereo panning synchonized with display.
- Voice calls added to "This is no cave" shot.
- Sound and video added to Super Laser Kick Force Award.
- Left/Right Orbit Audits fixed.
- Force Award Audit fixed.

Yes, version 1.04 is the new code version. This is a single eprom that you would replace.
If you are ordering, you should verify you have the latest display roms too - ROM0 A.105 and ROM1 A.105 - there are 2 display roms

I'm not seeing both display roms on Marcos site.

I've had good success with roms from John Wart. He's been burning roms for many years for the pinball community. [email protected]

It wouldn't hurt to ask.

Good, so all you need is the 1 game rom version 1.04, your display roms are current.

Here are some basic install directions for replacing a rom chip in your game.
http://www.actionpinball.com/tech/roms.php

You should be able to figure out the game rom you are replacing by looking at your MPU board. Perhaps it has a 1.03 sticker on it. Notice the orientation matters (where pin 1 or the notch will be located on the chip)

Nope, just power up and play. Unless you want to set it to free play or change any settings. Then you have to go into the menus by pushing the button inside near the coin door.

John replied to you above in post #14, yes he sells the chip so if you emailed him, I'm sure he will get back to you. Whenever you work on your game turn the game off. Everyone has to learn, so if this is your first game take precautions, read, ask questions and then make changes We don't mind to help, we were there before too. There are lots of good pinheads here.

Wait what? Driving to the computer place? You realize you are going to turn off the game, pop out one chip with your little flat screwdriver and insert the new chip and you are done correct? No driving necessary, and you don't have to take the board out

If you are totally paranoid, label all of the connectors on the wires plugged into the MPU board
unplug them leaving them hanging, remove the board frmo the backpanel (maybe 6-8 screws)
Take the board over to a flat surface like your table, and remove the chip with a small flathead screwdriver.
install the new chip remembering where the notch goes (or take a picture)
put the board back in, plug the connectors and turn on the game.

John shows the whole process in this other link:
http://www.thatpinballplace.com/documents/installing_eproms_de.html

Now enough talking about it, order the chip and get ready