302 redirect

[Eric Savina]

Hello,

In the online documentation of AppFog, it is stated that:

Redirect Your Root Domain
At your DNS host, set up a redirect (302) from your root domain (yourdomain.com) to www.yourdomain.com.

I have two questions:

1. Since I can not to a redirection using the console of domain host, will it be ok to do it using .htaccess?
2. Why should I do a 302 redirect instead of a 301?

Thanks,

Eric