How can i make a batch file still work, but stop people opening with notepad to edit/copy my commands?

I'd agree with the idea of making an executable - an exe, dll, ActiveX control or something else along those lines. Alternatively, you could just tell your 'friend' you're tired of him passing off your work as his and he can do his own programming for a change...

Purposely Make a batch file where he can edit and do stuff and make what ever he wants Its Keep your original codes authentic.

Earlier suggestion was to write the batch in VB or something then when it is compiled it would be hard to change... unless he is that good.. then he or she would not need you to make a batch file. :-) You can also use a batch compiler... (basically does the stuff I mentioned for you) http://www.abyssmedia.com/quickbfc/