How to create a new page?

hi all,

i have implemented a applaction with streams table with tags and
tagging support.

every thing is working fine for me.

Problem is while entering the data in to tables i am able to add all
fields in to streams table from new.html.erb,except tag name
assigning to this because tag will need id of sream table entry.

Once i done with adding the fields in to sterams table i am using
create button to update in database.Now i got stream id and i want to
assing the tagname to the stream, for this i am planning to open a new
page which is used to add tag name for table entries.
How to create a new page to do this?
if i am wrong give me correct way to do this?
thanks for reading query and any suggestions