Rio Grande

Hullo I am a new member and I have a Nu Venture Rio Motor home which is on a Citroen Dispatch L2 (Jumpy) base ,I have so far been unable to find a manual for the base vehicle , I ordered/bought a download version but was unable to open it after download even though I installed Java and other stuff as advised by the sites IT geek so any help on that would be appreciated, also thinking about some alloy wheels, I don't know anyone with a Dispatch so any general information in the right direction would be appreciated