Upgradation from CE10 to BO XI

Hi,

We have a web based (WIN 2k,IIS 5.0) application which has plenty of crystal reports shown in browser as embedded .pdf - we also have plenty of .csp pages.

The report repository is residing in Windows 2003 server - Now there's a proposal of upgradation of the existing Crystal version 10 to BO XI.

Does anyone have any idea about the amount of effort involved in it from the web server point of view / the attributes or tasks in web server which will define the effort required in upgradation.

Thanks in advance.

-Rupak