Is there any reason why I wouldnt want to re-use the water lines for my turbo. Its a 97 GSX. Do I need to bend them when I take them out or anything? I know I need 4 new crush washers for them. My other question is do I need new crush washers for a stainless steel feed line from RRE.

You can reuse the water lines no problem. You should replace the crush washers including the feed line but you don't always have to.
I'm not sure on a 2G but on a 1G there was no bending of water lines required to remove the turbo. I doubt it'd be different for yours.

Check out the VFAQ on this.
http://www.vfaq.com/mods/2G-16G.html It tells you what you have to do with the water lines.