need some help, take a look please

ok so my friend just made a new 508, so i downloaded it, and i go to run it, and that black box pops up for like half a sec and says "java is not reconized as an internal or external command, operable program or batch file"

i redownloaded the server, my jdk 6.0 and my java but the same thing keeps coming up

i downloaded and tried to use rs bot, but at a part where go to properties and enviorment or whatever, how there are 2 tabs, user and i forgot the other one, well i was soposed to change the other one but i changed user first, then changed the other one noticing my mistake. how do i go back and fix what i did

this is the part i messed up on


Step 2. Now that you have it all installed, your going to have to set the variables.
Click Start and right click on My Computer, then hit properties.
Click the Advanced tab (1.) and hit Environment Variables (2.)



Step 3. You should see 2 boxes now, User variables and System variables.
Look through the System variables list and find classpath.
Click on it and hit Edit, then highlight the value and delete it and paste
the following: CLASSPATH=C:\Program Files\Java\jdk1.6.0_10\bin;%CLASSPATH%;

If you do not have it click new and type in classpath for variable name, and for the value type in the following: CLASSPATH=C:\Program Files\Java\jdk1.6.0_10\bin;%CLASSPATH%;
You can then click OK.