Gal...
Jang is right that Sikhism is a completely different religion. While some of its roots may lie in Hinduism, Islam or both in terms of practises, the core beliefs are absolutely different.
You might say it is connected to Hinduism in the same way that Judaism, Christianity and Islam are connected - there's a definite chain of influence from the first to the last, but the end results of each are rather different.
Every religion I can think of right now has at least some influences from those that went before <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
