Cremation and Protestantism
Cremation is accepted by most Protestant denominations; however, what is considered to be a "Christian" funeral can vary widely. Since each denomination has its own beliefs what is acceptable and normal in one denomination, may not be acceptable in another. You may also find a wide range of what is considered "acceptable" even within the same denomination.
Most Protestant Denominations both endorse and encourage organ and tissue donation.
You may also find the following websites helpful:
Protestantism and Death: About.com
Cremation vs. Burial: ReligiousTolerance.org