Download a free theme (usually a .sis or .nth file) from repositories like Mob.org .

Then he found it.

Offers large collections of popular and top-rated themes specifically for the N95.

If your phone says "Certificate error" or "Unable to install," you need to hack your phone or enable "Software Installation: All" in Settings → Application Manager .

One morning, he installed a theme he’d made for a senior named Derek – a complex matrix-style cascade of green code. Halfway through the install, the N95 froze. Then it rebooted. Then it rebooted again. And again.