Can I install Unity on 10.04?

I don't have any problem with GNOME, it's actualy great, but wanna testing same thing new, how?

Backporting all the required parts was too much work for 10.10, so an option for 10.04 is highly unlikely.

However you can install an 11.04 image onto a USB stick, which would give you an option of trying it at your convenience without breaking your 10.04:

How do I install Ubuntu to a USB key? (without using Startup Disk Creator)

You can also of course use a Live CD.

Or, you can always install ubuntu 10.10 netbook remix, and choose it at login. Keep in mind that this is the netbook edition and isn't the current 11.04 progress, but it gives you the unity interface.

http://www.ubuntugeek.com/how-to-install-unity-in-ubuntu-10-0410-10.html