unusual question

hi,

i have to develop a program where you can display and change some data in R/3. this program will be only called in enterprise portal 6.0.

my question:

should i develop this program as normal dynpro in se80 and integrate it after in the portal with a r/3 iview or

is it better to develop it directly in the portal or

can i develop a web service in r/3 which i call from the portal with an iview.

how is it usual?

if you prefer the second possibility, how can i do this?

(web dynpro, java iview, use the connector framework ...)

lots of possibilities?

can anybody help me????

thanks

daniel