Xyramax did mine for around ?50, they seem ok but the AB is a little dimmer
than I had expected.

I just did mine myself at the same time as buying an SP for my son. I have
no previous knowledge of soldering, but I think I have done a sterling job!
No dust and only one air bubble at the very edge of the screen which is not
noticeable at all. I practiced my soldering skills on an old VGA card I had
lying around and enjoyed every minute of installing the afterburner in the
GBA.

Cost:
?14ish (I think) for afterburner from linkerworld (after conversion of
dollars into pounds)
?12 for a soldering iron and solder (low power one so it doesn't melt the
board!)

The job took me about 45 minutes and I am very pleased with the result. I
didn't install the dimmer chip or switch as I figured I wouldn't want the
light off - and I don't.

It does eat the batteries though!

Give it a go! I had little to lose as I had bought an SP at the same time.
If it all goes t*ts-up you could always use the money you saved on
installation towards buying an SP. I now have two systems which are great
for two player games.

HTH

-halli-