This is a very basic and simple casemod, and yet looks pretty sweet. With the new window you can see in to a whole new world of computing........not really.
You can do this project for about $25

Step 1: Pre-mod

I completed this project many years ago..... I decided Id use it for my first instructable.. this job can be completed in less than 1 day and by a novice modder.
Sorry for the lack of photos..... but this is an old project

Step 2: What to Buy.....

-Plexiglass for the window (you can score it to the desired shape/size)
-Vinyl rim (used in bathrooms to edge sinks)
-Jigsaw + metal cutting blade
or
-Side cutters
-High speed drills
-Superglue
-Cold cathode tubes (optional)

Step 3: The Modding

First Step:
-Remove panel and map out where you want windows.
-Take measurements:
4.75" Down from top of case.
1.5" Right from back of case.
3.5" Up from bottom of case.
7.25" Left from front of case

Second Step:
-Turn panel upside down (inward side facing you), now draw the window hole (use the measurements!)

Third Step:
-Carefully clamp panel to work bench (you don't want to dent it).
-Drill a hole in corner of window location

Fourth Step:
-Cut out lines with a jigsaw (you could also use side cutters / tin snips)

Fifth Step:
-Sand down sharp edges and make sure cuts are relatively straight (if you want a rectangle)

Step 4: Finishing Window

Sixth Step:
-Apply vinyl rim
-Slip the slit in the strip over the metal edge (flat side should be on the inside of panel)
-Squirt some superglue between vim and metal to make sure it stays
-Allow 5 minutes to dry

Seventh Step:
-Once dried, remove any labels from Plexiglas
-Apply a line of superglue along the flat side of vinyl rim
-Press the piece of Plexiglas over glue and hold for about 2 minutes

Let dry for about an hour, now your done!

Step 5: Extras

The vinyl rim really finishes off the projects, it will also hide any ugly cuts you made.....

Lighting!

Very easy, buy your Cathode lights and install within the case, simple!
Now the on/off switch for the light...

The light come with an on/off switch, well your going to have to take the front of the case off.
Measure where you want the switch to be... and draw a circle.

Drill the hole out and sand it down (normal sand paper works fine)

Dismantle switch, pull wires through, and attach the switch (most switches just clip into hole).

Turn off house lights and turn on the these babies! UV Cathodes will make your ordinary motherboard glow!
RAM/ PCI Cards/Video Card Glows a White Green

Your mod job doesnt have to end here,
How about an appliquÃ©? Buy one and stick it to the window.
Case Badges? eBay has tons.
LED Fans/Power supplies/Fan Grills? Easy to install! Just replace the old one.
Wire Care: Many sleeving kits available UV Reactive ones too.
UV Paint. Make anything glow now!