I've got 1 box with a xenium ice and 1 with a xenium gold.
Ice is installed via "quick solder method" which is fairly permanent
Gold in installed via "pin header" which is easier and is as easy as pull chip out and pop a new one on if the chip goes bad.
For those who don't know, the chips are pretty much exactly the same. They look different and the gold has a more updated OS, but they both do the exact same stuff.
I recommend doing a pin header install. The only hard part about it is the D0 wire and a little dab of flux makes that a not so hard thing to do.
My recommendation is based on you having a pre-1.3 mobo though since later revs. have become more complex of an install. I have yet to mod something other than a 1.0 or 1.1 so I can't really give you much of an opinion other than one based on documentation that is readily available at
www.xbox-scene.comI repeat....
www.xbox-scene.comyou'll find anything you want that is xbox related there
I recommend the forums as they have more up to date info.