W3 is the one of those program wich dont have to be installed to fully work.
You may copy existing folder with W3 and rename to W3old for example. Then patch existing game that in original W3 folder (must be normaly installed before!). And from then you can enjoy to play with 2 different W3 versions.
hmmm thx a lot, but before i install i have a question...will i be able to play on battle net like i have it now?? or just fawkz ?? thx again
If you using "BNGatewayEditor" you can see existing servers and add or remove servers manualy.
And ofcourse i forgot that you will need W3Loader but I guess you have iit already.