Caps will not get a faster response. You probably could have solved the problem already by reading the stickies at the top of the section. I'm feeling nice, though, so...add Java to your system path. Google should tell you how to do that. Also, you need another - before Xms1G and a space before -jar (maybe on the 2nd one).
If you don't feel like doing that, you can always add the entire Java path to the batch file, like this:
"C:\Program Files\Java\jre7\bin\java -jar -Xmx1G -Xms1G tekkit.jar nogui" where the Program Files may have a (x86) on the end, since you're using 32-bit, or may not.