Adobe Flash Player 10.3 Cannot Be Installed

Question

Whenever I try to watch BBC MotoGP or Formula 1 either LIVE or on iPlayer they refuse me till I install the latest Flash Player.
But Flash says this when I try to install:
Adobe Flash Player 10.3 Cannot Be Installed
Devices with Power PC processors are no longer supported.
What is this silliness, how can I get around this circular insanity?
This is my eMac specs:
Model Name:          eMac
  Model Identifier:          PowerMac6,4
  Processor Name:          PowerPC G4  (1.1)
  Processor Speed:          1.25 GHz
  Number Of CPUs:          1
  L2 Cache (per CPU):          512 KB
  Memory:          1 GB
  Bus Speed:          167 MHz
  Boot ROM Version:          4.8.8f0
  Serial Number (system):          VM4444E9QJ8
  Hardware UUID:          00000000-0000-1000-8000-000D9358E148

Answer 1

Mine installs fine  just never works, always says blocked plug in.
I have installed, uninstalled, emptied disabled plugin folder of flash.
searched, re uninstalled, re installed, rinse, lather, repeat.
iMac (Early 2008)
20-inch iMac(MB323LL/A)
Processor
2.4GHz Intel Core 2 Duo
Memory
1GB (one 1GB SO-DIMM) of 800MHz DDR2 SDRAM; supports up to 4GB