Hi Abishek,
I can't specifically answer the question around BI4.0 being available but seeing as Explorer is I would look at using the following credentials as requried for it:
System: Hana host name supplied in email and port 6400 eg hanasvr-01:6400
User Name: Your user id supplied in email
Password: Your password supplied in email
Note I havent tried this yet myself due to time constraints but basing it off Ronalds blog based here on how Explorer is logged in http://scn.sap.com/people/r.konijnenburg/blog/2011/12/26/sap-hana-developer-access-beta-program--get-the-best-out-of-your-test-drive
Cheers
Glenn
I just checked the FAQ and it states that the full BO landscape is not provided
http://wiki.sdn.sap.com/wiki/pages/viewpage.action?bc=true&pageId=257820641
The HANA developer landscape does not contain: