Install second language from .iso?

Hi,
I currently have Win7 RC1 installed in english but for screenshot purposes I would like to have japanese installed as a second language. I downloaded the japanese RC1 .iso, is there a way I can add the language files?

Thanks for help in advance!

You will have to install W7 with Japenese.

Yes, it can be done. You don't specify x32 or x64 so here are both the files you need;

x64 - amd64fre_client_ja-jp-GB1CxLP_JA_DVD.iso (0×78B0F90B)
x32 - x86fre_client_ja-jp-GB1CLP_JA_DVD.iso (0×6D8F6779)

Those will allow you to install the Japanese interface packs. Apologies, I cannot post links to those directly (I'm bound by an agreement w/MS) but I'm sure you can track them down.

Good luck.

Thanks Captain Zero, found it

EDIT: I extracted the .iso and pointed the language installer to the .cab. It detects the pack successfully as a MUI type language pack but says "This language cannot be installed on this computer" any suggestions? For info I have Win7 7100 RC1 x86 and downloaded the x86 pack